As many of you probably already know the Pentagon-sponsered DARPA challenge has been set for November 2007. This will be the most challenging DARPA ever. From DARPA, "Teams will compete to build an autonomous vehicle able to complete a 60-mile urban course safely in less than 6 hours."
Basically, what this means is that the vehicle will have to travel through heavy congested traffic autonomously. If anyone has driven downtown Chicago, you know how nuts something like this sounds! I found a great article really detailing everything involved: