It's free, and it's fun as hell. It's finally out of beta, so download now and play!
It's an FPS with a focus on speed. Seriously really fun gameplay.
Here's some footage
07/22 - Melt-Banana
07/26 - Forever Came Calling & Primitive Man
07/30 - Warped (?)
08/05 - Knockout Kid
08/07 - Fireworks (?)