Basically, it's autocross on big lots only, with the fastest S/SP/ST cars hitting 95 mph. No extra safety gear required.
Details here:
http://scca.com/_FileLibrary/File/06-6-fastrack.pdf
So, I'm really excited. This sounds like a heck of a lot of fun. It's just like the events groups like SVTOA put on, buthopefully with SCCA backing it will take off.