Over the past few months myself, and a few members of the Labman team, have been using our lunchtimes and evenings to work on converting a Nintendo Wii controller to operate a Raspberry Pi powered track based robot.
We are currently in the process of the second revision, with an improved power supply and a more automated Wii remote connection method.
We plan in the future to mount a Raspberry Pi camera onto a stepper motor so we can stream live images back to a web browser.