At the Houston get together yesterday, I was a asked about autocrossing your Solstice. Here's the local SCCA web site:
http://houscca.com/solo/index.asp
As you can see, the next session is next weekend (May 7) at Gulf Greyhound Park on I-45 near Texas City. Gate and registration opens at 7:30. Racing starts at 9 but I'd recommend getting there early to walk the course and listen to the instructor. Only costs $30 to run 4 times and they supply a helmet (if needed). I'd love to do it again but unfortunately, I can't make it.
Here's the link from when I did go a couple of months ago:
I Autocrossed my Solstice today!