Gamasutra

The online free version of Game Developer Magazine. Weekly articles on game design and threads for discussion.
http://www.gamasutra.com/

Gaming Insider

A very risque site with the latest rumors and insight on the game development world's inner workings.
http://www.gaminginsider.com/

Game Developer Magazine

Game Developer magazine is a monthly publication that delivers technical, how-to articles to professionals creating hits for the PC, console and arcade.
http://www.gdmag.com/

Gameslice

Reporting on events within the game industry they have no-holds barred editorials weekly on interesting topics.
http://www.gameslice.com/

Loonygames

Features articles about the craft of games. Regular tutorial columns on 3D animation and game design. Unique columns like Pixel Obscura's reviews of games from a cinematographer's perspective.
http://www.loonygames.com/

Game designer

Specialized information for those who want to produce their own on line games. Includes designs, links and other general information.
http://geocities.com/carhaeca/carhaecaI.html