I mentioned Bebot a while back and never got around to giving you a bit more information about it. In many ways Bebot is a lot like other theremin-esque (is that a word?) apps available on the app store. However, as a number of people have pointed out, there is more to this app than meets the eye. It is in fact quite deceptively versatile.
The app does give you a small amount of control over sound and waveform, together with the scale and a couple of effects, all of which helps a lot. However, the really impressive thing for me was the number of touches it would accept. Four simultaneous notes was really good.
I’d like to see some accelerometer functionality in the app, and maybe a record function too. But it is good as it stands.