Wiirduino: Anyone Use This?

I saw this cool video of a wii/arduino/ir/servo thingy on you-tube... WiIRduino Tracker - YouTube I thought it was pretty cool and i was wondering if anyone knows where i can either, buy this kit, make this, or find the code for the circuit they are using in the video. Anyone info is highly appreciated!

Check the "Exhibition" section: I'm pretty sure I've seen people showing off projects based on the Wii sensor.