http://itunes.apple.com/us/app/app/id417356232?mt=8&ign-mpt=uo%3D2# http://forums.toucharcade.com/showthread.php?t=85357&highlight=wave+beat
Looks interesting. Given the rather grim impressions from earlier buyers, I probably wouldn't buy this. But I'll give it a shot for free. EDIT: Actually looks like iTunes reviews are good. Was looking at the TA thread and the "Caution" rating from STP.