diff --git a/templates/zephyr/index.html b/templates/zephyr/index.html
index 0e981e22c5..936ef7d817 100644
--- a/templates/zephyr/index.html
+++ b/templates/zephyr/index.html
@@ -15,6 +15,10 @@
 {% rawjstemplate "subscription" %}
 </script>
 
+<script id="template_invite_subscription" type="text/x-handlebars-template">
+{% rawjstemplate "invite_subscription" %}
+</script>
+
 <script id="template_userinfo_popover_title" type="text/x-handlebars-template">
 {% rawjstemplate "userinfo_popover_title" %}
 </script>
@@ -52,6 +56,7 @@
 <script type="text/javascript" src="{{ static_hidden }}js/hotkey.js"></script>
 <script type="text/javascript" src="{{ static_hidden }}js/notifications.js"></script>
 <script type="text/javascript" src="{{ static_hidden }}js/hashchange.js"></script>
+<script type="text/javascript" src="{{ static_hidden }}js/invite.js"></script>
 <script type="text/javascript" src="{{ static_hidden }}js/zephyr.js"></script>
 
 {% if debug %}
@@ -132,6 +137,12 @@ var people_list = [
                     <span class="hidden-phone"> Feedback</span>
                   </a>
                 </li>
+                <li title="Invite users to Humbug">
+                  <a href="#invite-user" role="button" data-toggle="modal">
+                    <i class="icon-gift"></i>
+                    <span class="hidden-phone"> Invite users to Humbug</span>
+                  </a>
+                </li>
                 <li title="Log out">
                   <a href="/accounts/logout">
                     <i class="icon-off"></i>
@@ -238,5 +249,6 @@ var people_list = [
     </div><!--/row-->
     {% include "zephyr/keyboard_shortcuts.html" %}
     {% include "zephyr/markdown_help.html" %}
+    {% include "zephyr/invite_user.html" %}
 
 {% endblock %}
diff --git a/templates/zephyr/invite_user.html b/templates/zephyr/invite_user.html
new file mode 100644
index 0000000000..e5cfdd145b
--- /dev/null
+++ b/templates/zephyr/invite_user.html
@@ -0,0 +1,30 @@
+<div class="modal hide" id="invite-user" tabindex="-1" role="dialog"
+     aria-labelledby="invite-user-label" aria-hidden="true">
+  <div class="modal-header">
+    <button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
+    <h3 id="invite-user-label">Invite users to Humbug</h3>
+  </div>
+  <form id="invite_user_form" class="form-horizontal"
+        action="/json/invite_users" method="POST">{% csrf_token %}
+    <div class="modal-body">
+      <div class="control-group">
+        <div id="invite-result"></div>
+        <label class="control-label" for="invitee_emails">Emails (one on each line or comma-separated)</label>
+        <div class="controls">
+          <textarea rows="2" id="invitee_emails"
+                    name="invitee_emails"
+                    placeholder="One or more email addresses..."></textarea>
+        </div>
+      </div>
+        <div class="alert" id="invite_status"></div>
+      <div class="control-group">
+        <label class="control-label" for="streams_to_add">Streams they should join</label>
+        <div class="controls" id="streams_to_add"></div>
+      </div>
+    </div>
+    <div class="modal-footer">
+      <button class="btn" data-dismiss="modal" aria-hidden="true">Cancel</button>
+      <button class="btn btn-primary" type="submit">Invite</button>
+    </div>
+  </form>
+</div>
diff --git a/tools/jslint/check-all.js b/tools/jslint/check-all.js
index 7ef5ad8f24..cc0fcf3490 100644
--- a/tools/jslint/check-all.js
+++ b/tools/jslint/check-all.js
@@ -48,6 +48,9 @@ var globals =
     // hashchange.js
     + ' hashchange'
 
+    // invite.js
+    + ' invite'
+
     // ui.js
     + ' ui'
 
diff --git a/zephyr/jstemplates/invite_subscription.html b/zephyr/jstemplates/invite_subscription.html
new file mode 100644
index 0000000000..873375ef17
--- /dev/null
+++ b/zephyr/jstemplates/invite_subscription.html
@@ -0,0 +1,11 @@
+{{! Client-side Mustache template for rendering subscriptions in the "invite user" form.}}
+<a href="#" onclick="invite.set_all_streams(event, true);">Check all</a> |
+<a href="#" onclick="invite.set_all_streams(event, false);">Uncheck all</a>
+<div id="stream-checkboxes">
+  {{#each subscriptions}}
+  <label class="checkbox">
+    <input type="checkbox" name="stream" value="{{this}}" checked="true"> {{this}}
+  </label>
+  {{/each}}
+</div>
+
diff --git a/zephyr/static-access-control/4nrjx8cwce2bka8r/js/invite.js b/zephyr/static-access-control/4nrjx8cwce2bka8r/js/invite.js
new file mode 120000
index 0000000000..d6a751c2cf
--- /dev/null
+++ b/zephyr/static-access-control/4nrjx8cwce2bka8r/js/invite.js
@@ -0,0 +1 @@
+../../../static/js/invite.js
\ No newline at end of file
diff --git a/zephyr/static/js/invite.js b/zephyr/static/js/invite.js
new file mode 100644
index 0000000000..0f9f7c6681
--- /dev/null
+++ b/zephyr/static/js/invite.js
@@ -0,0 +1,76 @@
+var invite = (function () {
+
+var exports = {};
+
+function update_subscription_checkboxes() {
+    // TODO: If we were more clever, we would only do this if the
+    // stream list has actually changed; that way, the settings of the
+    // checkboxes are saved from invocation to invocation (which is
+    // nice if I want to invite a bunch of people at once)
+    $('#streams_to_add').html(templates.invite_subscription({subscriptions: stream_list}));
+}
+
+exports.initialize = function () {
+    var invite_status = $('#invite_status');
+    var invitee_emails = $("#invitee_emails");
+    var invitee_emails_group = invitee_emails.closest('.control-group');
+
+    $('#invite-user').on('show', update_subscription_checkboxes);
+    invitee_emails.focus();
+    invitee_emails.autosize();
+    $("#invite_user_form").ajaxForm({
+        dataType: 'json',
+        clearForm: true,
+        beforeSubmit: function(arr, $form, options) {
+            invite_status.hide()
+                         .removeClass('alert-error alert-warning alert-success');
+            invitee_emails_group.removeClass('warning error');
+            // The array of form data takes the following form:
+            // [ { name: 'username', value: 'jresig' }, { name: 'password', value: 'secret' } ]
+            // TODO: You could alternatively parse the textarea here, and return errors to
+            // the user if they don't match certain constraints (i.e. not real email addresses,
+            // aren't in the right domain, etc.)
+            //
+            // OR, you could just let the server do it. Probably my temptation.
+            return true;
+        },
+        success: function (resp, statusText, xhr, form) {
+            invite_status.text('Users invited successfully.')
+                          .addClass('alert-success')
+                          .show();
+        },
+        error: function (xhr, error_type, xhn) {
+            var arr = $.parseJSON(xhr.responseText);
+            if (arr.errors === undefined) {
+                // There was a fatal error, no partial processing occurred.
+                invite_status.text(arr.msg)
+                              .addClass('alert-error')
+                              .show();
+            } else {
+                // Some users were not invited.
+                var error_list = $('<ul>');
+                $.each(arr.errors, function (index, value) {
+                    error_list.append($('<li>').text(value.join(': ')));
+                });
+
+                invite_status.addClass('alert-warning')
+                              .empty()
+                              .append($('<p>').text(arr.msg))
+                              .append(error_list)
+                              .show();
+                invitee_emails_group.addClass('warning');
+
+            }
+
+        }
+    });
+};
+
+exports.set_all_streams = function (e, val) {
+    $('#streams_to_add :checkbox').attr('checked', val);
+    e.preventDefault();
+};
+
+return exports;
+
+}());
diff --git a/zephyr/static/js/setup.js b/zephyr/static/js/setup.js
index 7e42c8e4ca..2f9562c885 100644
--- a/zephyr/static/js/setup.js
+++ b/zephyr/static/js/setup.js
@@ -16,7 +16,7 @@ $(function () {
     // Compile Handlebars templates.
     $.each(['message', 'subscription',
             'userinfo_popover_title', 'userinfo_popover_content',
-            'timeinfo_popover_content'],
+            'timeinfo_popover_content', 'invite_subscription'],
         function (index, name) {
             templates[name] = Handlebars.compile($('#template_'+name).html());
         }
diff --git a/zephyr/static/js/ui.js b/zephyr/static/js/ui.js
index e8ded192a7..bb7a56c99b 100644
--- a/zephyr/static/js/ui.js
+++ b/zephyr/static/js/ui.js
@@ -591,6 +591,7 @@ $(function () {
     search.initialize();
     notifications.initialize();
     hashchange.initialize();
+    invite.initialize();
 
     $("body").bind('click', function () {
         ui.hide_userinfo_popover();
diff --git a/zephyr/static/styles/zephyr.css b/zephyr/static/styles/zephyr.css
index 51d348f47f..c0e0d057c0 100644
--- a/zephyr/static/styles/zephyr.css
+++ b/zephyr/static/styles/zephyr.css
@@ -606,3 +606,20 @@ table.floating_recipient {
     width: 140px;
     float: right;
 }
+
+#invite_user_form {
+    margin-bottom: 0px;
+}
+
+#invitee_emails {
+    min-height: 40px;
+    max-height: 300px;
+}
+
+#invite_status {
+    display: none;
+}
+
+hr.sidebar {
+    margin: 0px;
+}