I have a new site, and am trying to be as thorough as possible, posting trackday organizations with a link to their site. Please take a quick look to make sure you're on my list. I'm posting by state and each track, so we don't have to search all over the web at different organizations to find a date that fits the riders schedules. Just shoot me a line, or post your organizations name on this topic if I missed it, and I'll take care of the rest.
http://dynamictrackrider.com/Trackday_Organizations.php