Alright someone that got their kid a Wii system has to try and hook up the joystick to a CNC.  Here is a video of someone using it on a RC car.

For those that don't know the Wii controller is a hand held remote joystick.  I think it is not practical but you just gotta try it kind of technology.

http://www.wiihaveaproblem.com/show_article.php?id=113