From what I've read, Stanford and Carnegie Melon are favorites. The Stanford bot supposedly has gone through 200 miles of arizona desert by itself. And they aren't telling one how long it took them. Anyone willing to make a bet on whos gonna win? I'm going with Carnegie Melon's Red Team.
Also, if you get a chance theres a
really cool resource on the DARPA site. All of the technical papers from last year's competition are available to read.
Check it out pretty neat stuff.
And for the added bonus, the tracking site is now up
here