It seems that, given a bank of infra red LEDs, some reflective metal tape and a Wii, you can control the Wii by moving your fingers around infront of the Wiimote.
The best thing is that because the Wiimote uses Bluetooth, you could control any bluetooth device you can pair with.
And, like a certain phone (and iPod), you can control it with multiple fingers.
http://gizmodo.com/gadgets/clips/wii...-tv-321329.php