Here are some of my favorite Pontiac and GTO links in no particular order.
FossilCars.com
The GearHead Cafe
Spotts Performance
CarParts.com
The Classic Auto Mall
CarScene
Rich Rauch's Pontiac Server
Mike's Tri-Powers
GTO listserv Web Site
Classical Pontiac
Pontiac Oakland Club International
Pontiac Historical Services
Year One
Pontiac Enthusiast Magazine
Performance Years
High Performance Pontiac Magazine
Ames Performance Engineering
The Pontiac Links Page
The Pontiac Power Page