This Belkin Wemo I picked up is cool, but I'm still waiting for a real whole home solution:

The iPhone app is dead simple and the IFTTT integration is really neat. So is the remote control over the Internet and the per device photo ability. The device is fairly bulky though. I'm really looking forward to 2nd and 3rd gen intelligence. Thanks to Cliffy for telling me about them. $49 at Home Depot. Motion sensor is available, but not sold at Home Depot.