There is a site called http://www.thesamba.com that might be a good resource. Primarily a vw site but has a lot of porsche fans as well.
There used to be some links to porsche sites as well.
I have roughly 250+ copies (NOS) of the Porsche Sound History album. Printed in Germany in the mid 80's. It features brief facts about all of Porsche's cars from the Porsche One to their most recent creation, the 1982 Gruppe C racer. The albums have audio from famous races as well as interviews with both Ferdinand and Dr. Ferry Porsche. Pretty cool. I'd like to move the whole lot, ebaying for 40 each is tedious.