This project has been a long time coming. A looooooong time. In fact, it was one of the first I started after joining Foulab. The project is a set of wireless (well X10, so it goes through the house wiring) controllers for the heaters in my apartment. Each controller uses a DS1820 temperature sensor, and an ATmega 168 microcontroller.
Heres one of the finished products, and a graph of the temperature in the kitchen. The full writeup is on the Foulab website.