Other than gimmicks like The Clapper, we've always had to turn on and off our lights by touching stuff. No longer, my friends, as Ryan from Gogglemarks has made a switch powered by a capacitive sensor. To switch on and off the lights, just make any sudden moves in a close proximity to the sensor. Wicked.

HOWTO Build a Touchless Lightswitch [Gogglemarks via Make via Hacked Gadgets]