uDraw graphic tablets are currently on sale for as little as $10, due to them selling well below expectations and THQ being close to bankruptcy as a result. The graphics tablet are available for Xbox360, PS3 and Wii. I wrote a Linux driver for the PS3 tablet, it's available at Github:
Overall maybe not the most useful piece of tech, but for that price they make a fun toy to experiment around with. My Linux driver has modes to use the tablet as touchpad, gamepad or graphics tablet.