Collabolla collaborative Pac-Man

See, those giant inflatable balls aren't just for pilates sessions at Crunch, as proven by three students at the Interaction Design Institute in Ivrea, Italy who created Collabolla, a Pac-Man game that is played using two of these giant balls instead of a joystick. The inflatable balls send commands to a computer, and it actually requires to players to cooperate together to play, with one controlling the left and right movement while the other controls the up and down.
We'd love to get a set (just so we can say we get exercise, since we never, ever leave Engadget HQ), but since there is only one prototype right now, maybe they can hook us up with a how-to. It looks like there are just a lot of touch-sensitive pads involved.