I Kickstarted a BrickPi, just a few weeks ago, in order to bring my Rpi into my robots!!!
BrickPi is a system that converts Raspberry Pi into a LEGO® robot. The project is a board and case that connects LEGO® Mindstorms Sensors, motors, and parts to turn your credit card size computer into a robot. The BrickPi allows you to connect up to 3 NXT Motors and 4 Sensors. It has a 9V battery power source that powers the motors, sensors, and Raspberry Pi, un-tethering the Pi from the wall. Finally, it has a sturdy case with holes that snap with LEGO parts.The brains of a Raspberry Pi joined with the LEGO building system.