GNOME 3.8 is right around the corner – we are working on the release candidate today. In 3.8, shell extensions get a lot more recognition; via the new Classic mode that is built with extensions.
But there’s a whole universe of interesting extensions out there on extensions.gnome.org beyond the ‘official’ ones. Unfortunately, many of them are not currently marked as compatible with 3.8. Now is the perfect time to test your extension and make sure it is ready for the new stable release.