Just show up with a helmet, properly functioning car, and pay your fee. -- It runs $25 - $40 typically. A helmet (Snell 95 or later should be fine with most any club) is the only safety equipment necessary. Your car will need to pass a tech inspection. If it's newish you should be fine. If it's old, check it over yourself first. The SCCA autocross handbook can be found at http://www.tirerack.com/features/solo2/handbook.htm. It will give you a good overview of what autox is about, classing, driving, and tech. A list of local "Solo" events (and local clubs) is at http://planet-torque.com/sche.php?type=Solo. It's a blast. It's cheap. It's safe for you and your car. You'll learn a lot about car control. You should definitely come out and give it a try.

always wondered wtf this was. i went past this sunday and saw it going on. how do u get in?

crazy mini! i should find one so it can play with my miata!