GameDevelopmentSites
Since I'm having trouble keeping track of some of these links...
Game Development in General
http://www.gamedev.net
http://www.flipcode.com
http://www.gamasutra.com
(need to register, free accounts available)
http://www.igda.org
The forums are very instructive. You might also need to register, but there are free accounts.
Game Programming
GameDev
?
.net and FlipCode
?
(above) both have good programming references
http://www.gbadev.org
Stuff about programming for the
GameBoy
Advance
Game Design
good articles at Gamasutra, some on the GameDev
?
and FlipCode
?
, and stuff on the IGDA forums
[Chris Crawford's site]
Insightful rants by an old guy living in the woods who used to work for Atari
[The Art of Computer Game Design]
amazing book by Chris Crawford
http://www.costik.com/weblog/
Weblog of a game designer
http://www.sirlin.net/
Writer seems focused on RTS and action/fighting games, but good insights
The Biz
http://www.sloperama.com/advice.html
Advice from an old-timer
http://www.igda.org/breakingin/career_paths.htm
IGDA's "breaking in" section