USEFUL LINKS
Id Software The only site to get the absolute latest in Quake, Quake 2, Doom and Hexen. They also made Wolfenstien 3D, but then, everybody makes mistakes.
GameSpy 3D This is the place to get Quake Spy, I think. The version I downloaded didn't work but you might have more luck than that...
There are more links, but I can't be bothered to put them in...
E-mail me with any good Quake links you find and I'll add them to this page (promise).