The BattleBots Technical Forum
Deals with technical and general issues regarding building a robot to compete in BattleBots and other Robot Combat events, and is for veterans and beginners alike.
The Robot Fighting League (RFL) Forum
Discussions related to the attack robots, their competitions, and RFL's mission and goals.
The Robot Wars Forum
Based at Delphi, a bit more technical than some of the others. [Membership]