IGN
Screenshots, videos, previews, news, and a message board.
http://ps3.ign.com/objects/748/748468.html

FilePlanet
Provides movies and trailers.
http://www.fileplanet.com/104586/0/section/Warhawk

GameStats
Videos, screenshots, article links, and a message board.
http://www.gamestats.com/objects/748/748468/

GameSpot
News, previews, images, videos, links, and a forum.
http://www.gamespot.com/ps3/action/warhawk/

1UP
News, previews, images, videos, files, cheats, and links.
http://www.1up.com/do/gameOverview?cId=3140598

Eurogamer
News, previews, and screenshots.
http://www.eurogamer.net/game.php?game_id=4718

WorthPlaying
Preview, by Hank: "From what we've seen, the multiplayer mode is enjoyable and the gameplay looks promising."
http://www.worthplaying.com/article.php?sid=34208&mode=thread&order=0