Expand the volunteer page a bit. (#86)

Author: tbrownaw

source/get-involved/volunteer.html.twig

@@ -11,8 +11,21 @@ title: Volunteer
                     <h1>Volunteer</h1>
                 </div>
                 <div class="page_group">
+                    <h2>Want to start a user group, or help an existing one?</h2>
                     <p>
-                        Info coming soon™. For now join us in slack and join the #mtf-contrib channel.
+                        <a href="/blog/2015/05/19/join-memtech-on-slack-chat/">Join us in slack</a> and join the #meetups and #mtf-contrib channels.
+                    </p>
+                </div>
+                <div class="page_group">
+                    <h2>Just want to do Good Things™ with tech?</h2>
+                    <p>
+                        Volunteer for <a href="http://www.givecampmemphis.org/">GiveCamp Memphis</a>
+                    </p>
+                </div>
+                <div class="page_group">
+                    <h2>Want to contribute to MTF itself?</h2>
+                    <p>
+                        Info coming soon™. For now <a href="/blog/2015/05/19/join-memtech-on-slack-chat/">join us in slack</a> and join the #mtf-contrib channel.
                     </p>
                 </div>
             </div>