http://forums.forgottenwars.net is where Forgotten Wars projects are built and discussed.
http://forums.fwstudios.net is FWStudios, for independently-created (read: they don't have me meddling in the creative process) mods.
http://forums.interplay.com is the Interplay forum, and in my opinion far superior to the Bioware forum if you like being on "official" sites. (The Bioware forum has a disappointingly high troll ratio and is fairly light on new ideas.)
There's also Usenet alt.games.baldurs-gate.
There are other resources but if you're looking to widen your net just a bit, those would be my top recommendations.