you can have it cheaper than a wii-remote and big tv!

all you need is a webcam, a basecap, some cheap electronics(1 battery, some cables, resistor, 3 ir led's) and a bit of soldering skills.

then you download this program and youre ready to go!

http://www.free-track.net/english/

it works so that the webcam wich can see IR light tracks the 3 ir led sources mounted on your head and translates this in form of movement.

i use this when i fly around in ms flightsim x, or some driving simulation. its so great to use your head to look around in your cockpit.

its a great alternative for the expensive trackIR wich is above 150$... i endet up paying 10 € for the whole solution and my cheapo webcam does the job perfectly.

look here for an example video http://www.youtube.com/watch?v=w2xfkcjPOIA

ok i admit its looking geeky, just make shure no one comes in the room when you wear your cap... have fun!