For Firebird devotees a new community on Livejournal was created.

http://community.livejournal.com/firebirdsql/

Seems to be popular in Russia

http://en.wikipedia.org/wiki/LiveJournal

jwz seems to use it
http://jwz.livejournal.com/

also did i mentioned that is open source and it uses xmpp (jabber)

I have created my account there just to test some things
http://mapopa.livejournal.com/