Crownstone, the smart power outlet that recognizes you and your devices.
((Update October 2015. Response was very high in Europe, so design manufacture and sales will be more focussed on EU first, resulting in new lower prices there. ))
Now on Kickstarter , see http://crownstone.rocks. It forms a bluetooth network of devices, lamps and sensors. And yes sure your own cellphones, and that for only 75 euro for 2 or 3 stones, with a lot of software.
You can swith everything, measure their energy use and trace them in your own house or building.
The Crownstone is also an iBeacon (on 230V ac). An it can be built into wallsockets so you do not need the ball-type Crownstone there.
On the kickstarter site are films showing what you can do with the stones and you can order them right there.
I like it, and so will you.
Jaap van Till, theConnectivist