[Anupam Goli]

I think you're allowed to use anything to control your robot as long as it doesn't break any of the obvious rules (safety, strong beams of energy, etc). I've had positive results with xbox 360 wired controllers and with the Logitech extreme joysticks (the one with a twisting axis along with the standard x and y axes). I would never trust a wireless controller in the heat of competition. Wired ones are the easiest to troubleshoot in my opinion.