This would very cool indeed. I guess the features would need trimmed back a little to fit the control on screen. maybe use accelerometer to get the deck and fader etc in vertical view and then go horizontal for speed adjust, navigation and loop buttons. Talk about a killer app.
Otherwise I'd really like to see a port of Djay for OSX, the fairly basic interface should be easy to run with flabby digits on the touch screen.
Heres the site
http://www.djay-software.com/
Maybe some of us should email the developer with a bit of persuasion to get into the iPhone developer program
