there is a dragstrip in dallas, they have racing on 10/10.
There is atlantadragway, they have fast fridays 2 or 3 times a month. www.atlantadragway.com
There is the scca autocross, 1-3 times per month. http://apexbenefits.biz/ABS-Mtrsports.htm
There is the local bmw club that has periodic autocrosses, open to all http://www.peachtreebmwcca.org/default.asp
There is www.350zfrenzy.com
where a lot of atlanta z owners have regular get-togethers and monthly drives
There is www.georgiazclub.com
, which meets the first tuesday of the month at 730 at hooters on jimmy carter blvd, in norcross and is having a track day at little talledega later this month.
Thats just some of the things I can think of off the top of my head. There are a whole lot of things going on in georgia, I'd say as much or more than southern california, you just have to look around and come out!