diff --git a/src/Invite.js b/src/Invite.js
new file mode 100644
index 0000000000..3b52d6a1f4
--- /dev/null
+++ b/src/Invite.js
@@ -0,0 +1,45 @@
+/*
+Copyright 2016 OpenMarket Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import MatrixClientPeg from './MatrixClientPeg';
+
+const emailRegex = /^\S+@\S+\.\S+$/;
+
+export function getAddressType(inputText) {
+    const isEmailAddress = /^\S+@\S+\.\S+$/.test(inputText);
+    const isMatrixId = inputText[0] === '@' && inputText.indexOf(":") > 0;
+
+    // sanity check the input for user IDs
+    if (isEmailAddress) {
+        return 'email';
+    } else if (isMatrixId) {
+        return 'mx';
+    } else {
+        return null;
+    }
+}
+
+export function inviteToRoom(roomId, addr) {
+    const addrType = getAddressType(addr);
+
+    if (addrType == 'email') {
+        return MatrixClientPeg.get().inviteByEmail(roomId, addr);
+    } else if (addrType == 'mx') {
+        return MatrixClientPeg.get().invite(roomId, addr);
+    } else {
+        throw new Error('Unsupported address');
+    }
+}
diff --git a/src/component-index.js b/src/component-index.js
index 97f8882b82..d61192de33 100644
--- a/src/component-index.js
+++ b/src/component-index.js
@@ -48,6 +48,7 @@ module.exports.components['views.create_room.RoomAlias'] = require('./components
 module.exports.components['views.dialogs.DeactivateAccountDialog'] = require('./components/views/dialogs/DeactivateAccountDialog');
 module.exports.components['views.dialogs.ErrorDialog'] = require('./components/views/dialogs/ErrorDialog');
 module.exports.components['views.dialogs.LogoutPrompt'] = require('./components/views/dialogs/LogoutPrompt');
+module.exports.components['views.dialogs.MultiInviteDialog'] = require('./components/views/dialogs/MultiInviteDialog');
 module.exports.components['views.dialogs.NeedToRegisterDialog'] = require('./components/views/dialogs/NeedToRegisterDialog');
 module.exports.components['views.dialogs.QuestionDialog'] = require('./components/views/dialogs/QuestionDialog');
 module.exports.components['views.dialogs.SetDisplayNameDialog'] = require('./components/views/dialogs/SetDisplayNameDialog');
diff --git a/src/components/views/dialogs/MultiInviteDialog.js b/src/components/views/dialogs/MultiInviteDialog.js
new file mode 100644
index 0000000000..0d487c32c4
--- /dev/null
+++ b/src/components/views/dialogs/MultiInviteDialog.js
@@ -0,0 +1,199 @@
+/*
+Copyright 2016 OpenMarket Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React from 'react';
+
+import {getAddressType, inviteToRoom} from '../../../Invite';
+import sdk from '../../../index';
+
+export default class MultiInviteDialog extends React.Component {
+    constructor(props, context) {
+        super(props, context);
+
+        this._onCancel = this._onCancel.bind(this);
+        this._startInviting = this._startInviting.bind(this);
+
+        this.state = {
+            busy: false,
+            completionStates: [], // State of each address (invited or error)
+            errorTexts: [], // Textual error per address
+            done: false,
+        };
+        for (let i = 0; i < this.props.inputs.length; ++i) {
+            const input = this.props.inputs[i];
+            if (getAddressType(input) === null) {
+                this.state.completionStates[i] = 'error';
+                this.state.errorTexts[i] = 'Unrecognised address';
+            }
+        }
+    }
+
+    _onCancel() {
+        this.props.onFinished(false);
+    }
+
+    _startInviting() {
+        this.setState({
+            completionStates: [],
+            busy: true,
+            done: false,
+        });
+        this._inviteMore(0);
+    }
+
+    _inviteMore(nextIndex) {
+        if (nextIndex == this.props.inputs.length) {
+            this.setState({
+                busy: false,
+                done: true,
+            });
+            return;
+        }
+
+        const input = this.props.inputs[nextIndex];
+
+        // don't try to invite it if it's an invalid address
+        // (it will already be marked as an error though,
+        // so no need top do so again
+        if (getAddressType(input) === null) {
+            this._inviteMore(nextIndex + 1);
+            return;
+        }
+
+        // don't re-invite (there's no way in the UI to do this, but
+        // for sanity's sake)
+        if (this.state.completionStates[nextIndex] == 'invited') {
+            this._inviteMore(nextIndex + 1);
+            return;
+        }
+
+        inviteToRoom(this.props.roomId, input).then(() => {
+            this.setState((s) => {
+                s.completionStates[nextIndex] = 'invited'
+                return s;
+            });
+            this._inviteMore(nextIndex + 1);
+        }, (err) => {
+            let errorText;
+            let fatal = false;
+            if (err.errcode == 'M_FORBIDDEN') {
+                fatal = true;
+                errorText = 'You do not have permission to invite people to this room.';
+            } else if (err.errcode == 'M_LIMIT_EXCEEDED') {
+                // we're being throttled so wait a bit & try again
+                setTimeout(() => {
+                    this._inviteMore(nextIndex);
+                }, 5000);
+                return;
+            } else {
+                errorText = 'Unknown server error';
+            }
+            this.setState((s) => {
+                s.completionStates[nextIndex] = 'error';
+                s.errorTexts[nextIndex] = errorText;
+                s.busy = !fatal;
+                s.done = fatal;
+                return s;
+            });
+            if (!fatal) {
+                this._inviteMore(nextIndex + 1);
+            }
+        });
+    }
+
+    _getProgressIndicator() {
+        const numErrors = this.state.completionStates.filter((s) => {
+            return s == 'error';
+        }).length;
+        let errorText;
+        if (numErrors > 0) {
+            const plural = numErrors > 1 ? 's' : '';
+            errorText = <span className="error">({numErrors} error{plural})</span>
+        }
+        return <span>
+            {this.state.completionStates.length} / {this.props.inputs.length} {errorText}
+        </span>;
+    }
+
+    render() {
+        const Spinner = sdk.getComponent("elements.Spinner");
+        const inviteTiles = [];
+
+        for (let i = 0; i < this.props.inputs.length; ++i) {
+            const input = this.props.inputs[i];
+            let statusClass = '';
+            let statusElement;
+            if (this.state.completionStates[i] == 'error') {
+                statusClass = 'error';
+                statusElement = <p className="mx_MultiInviteDialog_statusText">{this.state.errorTexts[i]}</p>;
+            } else if (this.state.completionStates[i] == 'invited') {
+                statusClass = 'invited';
+            }
+            inviteTiles.push(
+                <li key={i}>
+                    <p className={statusClass}>{input}</p>
+                    {statusElement}
+                </li>
+            );
+        }
+
+        let controls = [];
+        if (this.state.busy) {
+            controls.push(<Spinner key="spinner" />);
+            controls.push(<span key="progr">{this._getProgressIndicator()}</span>);
+        } else if (this.state.done) {
+            controls.push(
+                <button
+                    key="cancel"
+                    className="mx_Dialog_primary"
+                    onClick={this._onCancel}
+                >Done</button>
+            );
+            controls.push(<span key="progr">{this._getProgressIndicator()}</span>);
+        } else {
+            controls.push(
+                <button
+                    key="invite"
+                    onClick={this._startInviting}
+                    autoFocus={true}
+                    className="mx_Dialog_primary"
+                >
+                Invite
+            </button>);
+            controls.push(<button key="cancel" onClick={this._onCancel}>Cancel</button>);
+        }
+
+        return (
+            <div className="mx_MultiInviteDialog">
+                <div className="mx_Dialog_title">
+                    Inviting {this.props.inputs.length} People
+                </div>
+                <div className="mx_Dialog_content">
+                    <ul>
+                        {inviteTiles}
+                    </ul>
+                </div>
+                <div className="mx_Dialog_buttons">
+                    {controls}
+                </div>
+            </div>
+        );
+    }
+}
+
+MultiInviteDialog.propTypes = {
+    onFinished: React.PropTypes.func.isRequired,
+};
diff --git a/src/components/views/rooms/MemberList.js b/src/components/views/rooms/MemberList.js
index 5536aeddd6..a6ede6a61c 100644
--- a/src/components/views/rooms/MemberList.js
+++ b/src/components/views/rooms/MemberList.js
@@ -24,6 +24,7 @@ var sdk = require('../../../index');
 var GeminiScrollbar = require('react-gemini-scrollbar');
 var rate_limited_func = require('../../../ratelimitedfunc');
 var CallHandler = require("../../../CallHandler");
+var Invite = require("../../../Invite");
 
 var INITIAL_LOAD_NUM_MEMBERS = 30;
 var SHARE_HISTORY_WARNING =
@@ -191,22 +192,20 @@ module.exports = React.createClass({
 
         // email addresses and user IDs do not allow space, comma, semicolon so split
         // on them for bulk inviting.
-        var separators =[ ";", " ", "," ];
-        for (var i = 0; i < separators.length; i++) {
-            if (inputText.indexOf(separators[i]) >= 0) {
-                var inputs = inputText.split(separators[i]);
-                inputs.forEach(function(input) {
-                    self.onInvite(input);
-                });
-                return;
+        // '+' here will treat multiple consecutive separators as one separator, so
+        // ', ' separators will also do the right thing.
+        const inputs = inputText.split(/[, ;]+/).filter((x) => {
+            return x.trim().length > 0;
+        });
+
+        let validInputs = 0;
+        for (const input of inputs) {
+            if (Invite.getAddressType(input) != null) {
+                ++validInputs;
             }
         }
 
-        var isEmailAddress = /^\S+@\S+\.\S+$/.test(inputText);
-
-        // sanity check the input for user IDs
-        if (!isEmailAddress && (inputText[0] !== '@' || inputText.indexOf(":") === -1)) {
-            console.error("Bad ID to invite: %s", inputText);
+        if (validInputs == 0) {
             Modal.createDialog(ErrorDialog, {
                 title: "Invite Error",
                 description: "Malformed ID. Should be an email address or a Matrix ID like '@localpart:domain'"
@@ -243,53 +242,55 @@ module.exports = React.createClass({
             inviteWarningDefer.resolve();
         }
 
-        var promise = inviteWarningDefer.promise;
-        if (isEmailAddress) {
-            promise = promise.then(function() {
-                 return MatrixClientPeg.get().inviteByEmail(self.props.roomId, inputText);
-            });
-        }
-        else {
-            promise = promise.then(function() {
-                return MatrixClientPeg.get().invite(self.props.roomId, inputText);
-            });
-        }
+        const promise = inviteWarningDefer.promise;
 
-        self.setState({
-            inviting: true
-        });
-        console.log(
-            "Invite %s to %s - isEmail=%s", inputText, this.props.roomId, isEmailAddress
-        );
-        promise.then(function(res) {
-            console.log("Invited %s", inputText);
-        }, function(err) {
-            if (err !== null) {
-                console.error("Failed to invite: %s", JSON.stringify(err));
-                if (err.errcode == 'M_FORBIDDEN') {
-                    Modal.createDialog(ErrorDialog, {
-                        title: "Unable to Invite",
-                        description: "You do not have permission to invite people to this room."
-                    });
-                } else {
-                    Modal.createDialog(ErrorDialog, {
-                        title: "Server error whilst inviting",
-                        description: err.message
-                    });
+        if (inputs.length == 1) {
+            // for a single address, we just send the invite
+            promise.then(() => {
+                return Invite.inviteToRoom(self.props.roomId, inputs[0]);
+            }).catch((err) => {
+                if (err !== null) {
+                    console.error("Failed to invite: %s", JSON.stringify(err));
+                    if (err.errcode == 'M_FORBIDDEN') {
+                        Modal.createDialog(ErrorDialog, {
+                            title: "Unable to Invite",
+                            description: "You do not have permission to invite people to this room."
+                        });
+                    } else {
+                        Modal.createDialog(ErrorDialog, {
+                            title: "Server error whilst inviting",
+                            description: err.message
+                        });
+                    }
                 }
-            }
-        }).finally(function() {
+                self.setState({
+                    inviting: false
+                });
+            }).finally(() => {
+                self.setState({
+                    inviting: false
+                });
+                // XXX: hacky focus on the invite box
+                setTimeout(function() {
+                    var inviteBox = document.getElementById("mx_SearchableEntityList_query");
+                    if (inviteBox) {
+                        inviteBox.focus();
+                    }
+                }, 0);
+            }).done();
             self.setState({
-                inviting: false
+                inviting: true
             });
-            // XXX: hacky focus on the invite box
-            setTimeout(function() {
-                var inviteBox = document.getElementById("mx_SearchableEntityList_query");
-                if (inviteBox) {
-                    inviteBox.focus();
-                }
-            }, 0);
-        });
+        } else {
+            // if there are several, display the confirmation/progress dialog
+            promise.done(() => {
+                const MultiInviteDialog = sdk.getComponent('views.dialogs.MultiInviteDialog');
+                Modal.createDialog(MultiInviteDialog, {
+                    roomId: this.props.roomId,
+                    inputs: inputs,
+                });
+            });
+        }
     },
 
     getMemberDict: function() {