The Nest is the brainchild of Tony Fadell, one of the co-creators of the original iPod. A Wi-Fi enabled thermostat that learns from the user and promises significant energy savings, not to mention a much greater ease of use than traditional "smart" thermostats.
The Nest's iPhone app allows users to check and change their Nest's temperature and schedule remotely. It also allows users to view the history of their heating and cooling systems over the past 10 days. It's available free on the App Store. [Direct Link]
The thermostat will be sold for $249, the same price as on the Nest web store. Nest has also expanded its distribution to Lowe's.