Qualification rounds have begun today.
TGDaily has a whole lot of articles and team profiles/interviews they posted today, but their site is a bit tough to navigate to find all the DARPA stuff:
Opening Ceremonies
Interview with Axion Racing from Westlake Village, CA and their Jeep
Interview with Ody-Era from Kokomo, IN and their Mercury Mariner
Interview with Princeton University and their Ford Escape
Interview with NC State and their Lotus Elise
...and on the other end of the size scale from the Lotus team...
Videos from Team Oshkosh Truck (I really liked these)
Edit: There are some good team blogs too. Interestingly, I only managed to find frequently-updated blogs on the less-well-financed teams' sites.
Insight Racing (The Lotus Team)
CajunBot
Cornell (good luck Adam Shapiro!)
Edit2: Methodically went to each team site and went blog-hunting. Here are all the ones that seem to be updating daily or better
CIMAR
Team Jefferson
Princeton
Sting Racing
Virginia Tech (team Victor Tango)