I saw a demo of it at Maker's Faire. A young MSFT hacker was using the accelerometer and touch UI to drive a t shirt cannon that was controlled by Microsoft's

I saw a demo of it at Maker's Faire. A young MSFT hacker was using the accelerometer and touch UI to drive a t shirt cannon that was controlled by Microsoft's robotics studio. He could rotate the phone, tilt it up or down, and aim the t shirt cannon. It was really cool. On top of that, the UI that I could see was rather nice.