The Lojbanic Phone Group: arrange a real phone call (or Internet-based call) with another Lojban speaker at any skill level.
Other Forums
The Lojban Wiki
The Lojban Wiki has been the source of a huge amount of Lojbanic activity in the last few years, and is free for everyone to update and contribute to. Please come join us in creating a vast store of Lojbanic information, or just browse around and see what catches your eye.
Lojban IRC
Lojban IRC provides an informal meeting place for conversing quickly in Lojban. It is beginner-friendly, as well. The IRC channel can be reached by pointing your IRC program at irc.lojban.org.
Note: the logs are filtered so that they contain only lojbanic text. However, you might still be offended by the things discussed there. If you are, that's your problem, and the LLG explicitly disclaims responsibility for anything said on the IRC channel, including by members or officers of the LLG.
Furthermore, no guarantee is made as to the correctness of the Lojban therein.
The Lojbanic Interactive Story
The Lojbanic Interactive Story is a web-based story writing forum. The story itself is all in Lojban. Anyone can add to it, please go contribute!