Stumbled accross an incredible project this morning that interfaces a Wiimote & nunchuck into an Xbox 360. Basically it goes Wiimote -> Bluetooth into Laptop -> Outputs to project board through custom driver -> Project board with custom firmware -> PS2 gameport -> Adapter for 360 USB. He explains this insane project much better than I ever could, so here is the link:
http://obsiv.spaces.live.com/Blog/cn...F394!177.entry
Essentially, a project like this could realistically allow you to control your bot with a Wiimote. Now, it might be impractical (have to carry around laptop; long development process), but its definitely possible.