There was an app like this for s60 which i used to have. Basically you wave the hand from one side to the other and it changed the song back n forth. It would be great if you could use such an app while screen lock is activated because it would be a lil useless if you have to unlock it and then wave to it. Please do impliment it with the fmradio aswell as i use that everyday on my way to work. It is the one app i use the most. Thanks