I was at the DE, it was great playing in the rain although my windows kept fogging up! I was in the green run group with a red boxster that liked to smoke in the figure 8 turns. if you want to relive the mini AX at the end i filmed a few laps
http://www.youtube.com/watch?v=r_fF06-qWgw . You doing the autocross next weekend?
your CEL sounds like the MAF is the culprit... try cleaning it yourself first.