Aerodrums - app/kit for drummers (using Playstation 3 camera)

This was on the UK Dragons Den and I thought it was a neat use of existing technology (Playstation 3 camera which you can buy for about £10 now). So they basically wrote the software and created a product around that - which they sell at a pretty nice £155

I reckon if they dropped the price they could sell a lot more.

Anybody else have cool ideas using things like a Playstation camera?