First, watch the video. Second, realize this simply won’t work. Why? A pianist requires both hands and feet. It would have been much more convincing if the Bluetooth AirTurn for iPad video was made focusing on a… violinist. The AirTurn BT-105 is expected to be available in Q4’10. For more info check out AirTurn.
So I checked it out (here’s the 2-pedal link). You can keep the toe on the pedal and press the AirTurn with the heal: