Contact
From Avogadro - Free cross-platform molecule editor
Mailing Lists
avogadro-updates This list provides emails for Avogadro and LibAvogadro updates.
avogadro-devel Discussion of features and implementation details for Avogadro and libavogadro. If you are interested in getting involved with the Avogadro project you should start here. This is a very active list.
IRC
You can find most of Avogadro developers in the #avogadro channel on freenode (irc.freenode.net)