Clicky
Bit.Trip is, what looks like, Beat Mania meets Pong, kinda.
You hold the Wiimote sideways (like super paper mario), and tilt it to direct the paddle.
I really wanna try it, but it only has 3 songs, but each song is ~15 minutes long. I'm not quite sure if its worth it yet. It does support multiplayer, but the song remains the same, and your multiplayer-player is just there for assistance.
I do like the 8bit graphics and sound though...maybe I'll get it.