The DARPA Urban Challenge is an unmanned car race where cars are built to navigate using a combination of GPS, radar, and other technologies that can help get the cars from point A to point B in one piece.
Insight Racing's car is a customized Lotus with 9 Mac Minis, one laptop, a ton of laser guiding sensors (LMS) two powerful GPS units, a radar system, an advanced cooling system, a massive power inverter, and tons of other after market techiness.
Here is a short video I put together at today's demo:
Insight Racing's Steve Kuekes is the guy fielding the technical questions.