I just bought it ($0.99) and it is pretty cool. It feels very physical. However, there is some noise in the accelerometer that causes some slight jiggling as

I just bought it ($0.99) and it is pretty cool. It feels very physical. However, there is some noise in the accelerometer that causes some slight jiggling as you hold it. (Perhaps my phone is starting to die -- I wouldn't doubt it.) Some dampening here might help, but that would introduce latency. There are only really 3 models/rooms so it is only really good for showing off to other people.