I did the Richard Petty Driving Experience at Lowe's Motor Speedway two years ago. I was turning laps at 140mph - and the car was rock solid. I'm confident I could have easily done 175mph laps and not gotten the tires to squeal or chirp a bit.

With that said, I'm looking froward to an entire day of the SRT experience. Trying to talk my wife into doing it with me (not just as a guest). I think it's a great program and anyone who attends would benefit from it.
Looks like Englishtown NJ will be the closest one for me in '09.