I have mentioned SparkFun's AVC (Autonomous Vehicle Competition) to several people and this year I had the privilege of actually attending one (this years was June 16 2012). I also took photos and hopefully will get those posted to this blog entry before too much more time goes by. Until then, here is a link to (what I think) is one of the best videos about this year's AVC.
The best thing about this video is it shows some details about some of the winning entries of both the ground and air vehicles in the competition. (video is from Engineering TV):