A little off topic, but if you're looking for iPad touch control of things like MIDI devices, hardware is already out there to do that. Projects like touchOSC a

A little off topic, but if you're looking for iPad touch control of things like MIDI devices, hardware is already out there to do that. Projects like touchOSC are providing the graphical instances, as well as others like S1MIDITrigger. This is getting bigger and bigger, and I imagine that's the reason Jazz Mutant packed it in - the writing was on the wall that the iPad is storming this market.