From TechCrunch's post introducing Nest's Learning Thermostat:
Fadell got the idea designing his green home in Tahoe. He was shocked there wasn’t a single attractive thermostat on the market so he decided to build his own. The size of the market and the potential impact on the planet convinced him it was a great business. And if he didn’t do it, who would? The unit uses the guts of a smart phone and required someone who knows how to build drop-dead-easy user experiences.
The Nest Learning Thermostat is connected to Wi-Fi and can be remotely controlled by a iPhone app or a laptop. The thermostat will retail for $249 when it goes on sale in mid-November.