Joey Hess joey@kitenet.net is the author of git-annex. If you need to talk about something privatly, email me.
The forum is the best place to discuss git-annex.
The VCS-home mailing list is a good mailing list for users who want to use git-annex in the context of managing their large personal files.
For realtime chat, use the #vcs-home
channel on irc.oftc.net.