We have some good news! We just uploaded JFBConnect for Joomla 1.6, available to all subscribers. This release has all the functionality of the Joomla 1.5 release and includes all the social modules (fanbox, like, friends, comments, etc), the integration plugins for JomSocial and Community Builder, and the content plugin for automatic Likes/Comments in articles.
We didn't include the profile plugins for K2, Agora, or Kunena because those extensions have no (Agora), limited (Kunena), or brand-new and we haven't had time to test (K2) support for Joomla 1.6.
We're calling this a Release Candidate. We've been working on this release for quite a while, and have been testing it methodically, but there's always the chance of us missing something stupid. Should you run into issues, let us know, and we'll be all over it!
Best of luck to everyone, and have a great weekend!
Alex