Great post Adam!! Timothy, I just bought a Durametric diagnostic tool that you load software into a laptop and use the supplied cable that you plug into your car. Durametric allows free software updates off of it's site.
http://www.durametric.com/usedporschebuyersguide.aspx
This is that link to Durametrics "Used Car" page that shows you the info you want. The Enthusiast package cost me $250 and for me was money well spent. I had a airbag light that the dealer wanted $100 to clear and with this tool it took me 5 seconds!