My car freaked out and it was the ignition switch. I bought it from this guy on e-bay, fast shipping and fixed it myself.
This is a pretty easy fix if this ends up being the problem. You will save 300-400 bucks doing it yourself, I believe.
http://cgi.ebay.com/ebaymotors/New-Porsche-Carrerra-996-Boxster-911-Ignition-Switch-OE_W0QQitemZ250017309837QQihZ015QQcategoryZ33576QQ ssPageNameZWDVWQQrdZ1QQcmdZViewItem