Belkin WeMo Switch

The Belkin WeMo Switch is the simplest way to make your house smarter and more efficient. It enables you to power on or off any device that's plugged into it – whether TV, lamp, or air conditioner – with the simple push of a button in a free iPhone app. Since the hardware connects via WiFi, you don't even have to be at home to control the switch. [$50; belkin.com]