Since there were so many after merging the SA forums, here's a list of all the old stickies which have had to been un-stuck to save space:

Guides:
Two Player Full Guide
The Official Girlfriends Guide
Major Territory Glitch (to take over Las Venturas and San Fierro)
Video Mission Walkthroughs

Other Cool Shit:
List of things to do after 100% completion
Guess That Mission (Game)
San Andreas Movies
Major Territory Glitch (to take over Las Venturas and San Fierro)
What does your CJ look like?
Miscellaneous GTA: SA Pics