iBone - Trombone applet for iPhone

I don't have an iPhone, but I know you can do more with it than make some calls. This applet can be downloaded on iTunes, but the homepage is http://ibone.spoonjack.com/. I don't think that it is worth buying an iPhone for nor that it is any help in improving your trombone playing (except for practicing slide positions and notes), but it looks fun to try it. I can imagine that it is cool to have even for people that are not involved with music and such. The guy in this video is pretty handy with it.