I want to do this so bad. Peep the write-up at Engadget, but long story short the latest gimmick-cool use of Microsoft Surface is to do basic DJ work. By dragging loop icons into a central circle, that starts them playing and they'll go until you drag the icon back out. Other icons, once inside the circle, can be tapped for a one-off sound. I've always been too lazy to learn proper DJing, and too frugal to go pick up the newfangled CDJ systems that electronically simulate turntables, but a user-friendly approach like this would be a hell of a lot of fun to play with. You could even sell more sounds in a digital market, kinda like Rock Band does.C'mon Microsoft, do it!