Just a few of the shooting-related links that I've found interesting, useful, or helpful; more to come:
Miwall Corporation Wholesale Ammo (Frequent vendor at Crossroads of the West gunshows.) Oceanside Training and Tactics (Bill Heyder's website)
Walt Brubaker's Original Rainbow Range Website Ammunition to Go
Shooters.com Sportshooter.com (Has good GSSF section, too.)
The Glock FAQ (Wonderful maintenance descriptions.) Single Action Shooting Society
Cheaper Than Dirt (New merchandise of all sorts.) Auction Arms ("The best marketplace (Ebay-like) for Firearms on the Net.")
GSSF Online (The official site of the Glock Sport Shooting Foundation.) TopGlock.com (Everything related to Glocks.)