Development
Contact
We hang out on irc.freenode.net in the #mana channel and we're using a mailing list to communicate outside of IRC (though mailing list membership has to be manually approved so that we don't have to face spam).
Task and bug tracker
We're using Mantis, at http://bugs.manasource.org/.
Git repositories
Available at http://gitorious.org/mana.
Testing server
Running at http://testing.manasource.org on port 9601, at commits:
manaserv 9587aa47d1c5584d3582828a2f53b374d49dd702 manaweb e4de27aa09ba1b9ba329c76137da3ef7165ee046