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 <li><a href="sphinx/latest">Latest</a></li>
 </ul>
 
+<h3>How compatible?</h3>
+
+<ul>
+<li><a href="https://github.com/fifieldt">Tom Fifield</a> maintains <a href="https://docs.google.com/spreadsheet/ccc?key=0ArysOOuLgF_PdFlnSnA2bEtXMVFQSVNwUVZxNFNTaXc">the results</a> of <a href="https://github.com/ceph/s3-tests">Ceph S3 test suites</a></li>
+</ul>
+
 <h3>Support</h3>
 
 <p>Send anything about Swift3, questions, comments, suggestions, etc to <a href="http://wiki.openstack.org/MailingLists">the OpenStack mailing list<a/>.</p>