Fallout 3

GameSpot
News, previews, images, links, and a forum.
http://www.gamespot.com/pc/rpg/fallout3/

GameSpy
Provides information and news.
http://pc.gamespy.com/pc/fallout-3/

IGN
Screenshots, news, and a message board.
http://pc.ign.com/objects/568/568806.html

RobCo84 Fallout Fansite
Ideas for future games.
http://robco84.tripod.com/