Christopher Cote demo'd his automation framework which uses Python, RasPi, and Phidgets.
It's currently used to control an aquaponics system in his apartment.
Diagram of Christopher's automation framework
View of the web-based monitoring interface for the aquaponics system
Manual actions can be performed too like turning on lights, fans and pumps.
Phidgets module (http://www.phidgets.com/) connected to the Raspberry Pi over USB. Sensors such as pH are connected to the Phidgets module.
Jeff's Autonomous car: http://jeffsinventions.com/?p=577