Basically, it's a game where you have to stop the little balls from coliding with the big ball (you lose points), or getting sucked up some air vents (same punishment). The cool part about this game is that the controller is a webcam-type-thingy, and you actually use your arms to swat at the balls. Really, really fun. I only played it 5 minutes at a friends house, but I liked it. =)
Eyetoy? There are a few games that are pretty cool for it, this one just sounds boring. :P
It's pretty interesting, especially when you have several people behind you. =)