[AaronBBrown]

I went with ecobee thermostats (ecobee.com) because it already has a rich API. It doesn't have motion detection like Nest, but it does have a very useful web interface and a decent app for iPhone and Android. Since I work from home and have a stay at home wife with two young children, the motion detection was not a selling point for me. I wanted something a bit more Cisco router and less Apple Airport Extreme. I've been very happy with the 3 that I have in my house. My only complaint (and this is true of all connected thermostats) is that it relies on the company's infrastructure. If ecobee goes out of business, I lose much of the utility of the devices, though they don't turn into bricks.