I was just there on Wednesday Oct 3 2007. I had an absolutely killer day.
NESBA and STT both hold events there, but Wed. was an "Investor Lapping Day". It was $130 for 5 hours of open track time with never more than 10 bikes on the track at once. You can't beat it.
There will be another one of these days on Oct. 17th weather permitting. They really discourage new riders from coming out on these days since there is no instruction and there are no 'groups' but for anyone with previous track experience they're very nice days.