Left 4 Dead

GameSpot
News, previews, images, videos, links, and a forum.
http://www.gamespot.com/pc/action/left4dead/

GameSpy
Provides information, screenshots, and a preview.
http://pc.gamespy.com/pc/turtle-rock-project/

IGN
Video, screenshots, preview, news, and a message board.
http://pc.ign.com/objects/818/818215.html

1UP
Previews, screenshots, and videos.
http://www.1up.com/do/gameOverview?cId=3155405

Eurogamer
Preview, by Oliver Welsh: "Everything from weapons to level design to the eerily brilliant AI seems engineered with total economy and precision to do exactly what it needs to, no more, and definitely no less." <small>(March 2, 2007)</small>
http://www.eurogamer.net/article.php?article_id=73583