We were not able to make the race weekend because of other committments, but I hear it was a barn burner. Here is a link to the F500/F600 forum discussion.
http://formula500.org/viewtopic.php?t=4560
Lots of great comments from the other competitors and the fans too plus a $5000 payout in prize and tow money, also lots of contingency prizes too. The goal next year is 15 to 20 cars for each pro race weekend.