Hey Nathan,
We can always use fresh bodies!Spec 944 is the best way to go racing, especially if you like Porsches. Here in Norcal we usually run with the PRC group, a subset of NASA but all porsches. The rules are designed to keep car contact down but still close racing.
Do you own a car yet? If not the best thing to do is buy a car already built. Building one yourself is fun but not cost effective. Check the forums for cars for sale and maybe try some of the older posts to see if they are sold yet. The 944 is a very solid, reliable car so buying a well used race car is still a safe bet.
Come out to any NASA event and stop by to chat. This next race at Thunderhill doesn't look like we have a lot of guys signed up but I'll be there. Sonoma we should have a full field with guys getting ready for the championship race. Come by have some lunch, meet the people, and check out the cars! If you meet someone named Jim Foxx, beware! If he offers you a ride in his car say no or make sure your life insurance is paid up!