There's trading, previews of upcoming sets, places to contribute your own ideas for future sets (like how come we don't have an Jan Ors yet? Or Leebo? Everyone forgets the Sidekicks haha), there is a custom portion to show off and view other's customs and the most useful portion is a rules thread for helping resolve rules complaints and problems (as I'm sure you are aware there are many).
It's a cool site and I would also recommend checking out
www.bloomilk.com if you haven't been there. Similar to this one but a bit more open and active. Also sweet resources for checking out characters and squads. Anyways if you need any help navigating let me know!