The Nest - the so-called 'iPod of thermostats' - barely touched down on the marketplace before selling out; the smart themrostat is so popular that you won't be able to get your hands on one until early 2012. The company's site notifies customers that the demand was huge from day one and the orders haven't slowed down. We're sold out through early next year and have closed our store until then. Customers who pre-ordered their Nests will be receiving them on time, according to the company's website. Those who reserved a Nest on and received a reservation number will be able to reserve up to five Nests and receive the precocious pieces between December and February.

Designed by Tony Fadell, who headed the development of the iPod as well as the first three versions of the iPhone at Apple, the Nest has learning algorithms designed to help customers save up to 30 percent on their energy bills. Nest has been operating for about a year and a half and raised funding from Kleiner Perkins, Google Ventures and Al Gore's investment fund. The Nest itself was revealed on October 24 and sold out during its first week and a half on the market.