The Nest is the latest trend in technology; its a computer-driven thermostat with some fancy features, namely; its remote access via the internet.
Designed by Tony Fadell, who ran the iPod division at Apple, amongst other things, the Nest is made to power itself. It also carefully tracks your heating/cooling habits and determines an optimal environment. It then shows a green or red leaf to urge you in the direction of using less or more energy.