The awesomely slick Unreal Engine 3 indie game inMomentum, which happens to be all about running around beautifully simplistic environments, is accepting multiplayer beta applications. Hit up this link to apply.
The full game is supposedly going to be out around the middle of July, so this beta will be shortlived, but will give those interested a chance to check out the game. Oh, and the twenty testers that contribute the most to polishing the game will each receive a free copy. Not even mainstream development studios do that.