All over the web gaming sites like Kotaku are reporting that LucasArts has been developing a motion controlled Star Wars game to use the Xbox360's newfangled Wiimote Project Natal Kinect capture hardware.
Most promising may well be a Star Wars game, developed by Microsoft and Lucasarts, that features controller-free lightsaber duels, complete with force powers like "force push".
I guess you could always grab a cucumber from the fridge and wave that around as a substitute.
UPDATE: Whoa boy. There's footage. Although it's as much video of someone playing the game as it would be if you taped yourself watching Star Wars and miming every scene in front of your television.
Source: Kotaku