BlackSite - Area 51

GameSpot
News, previews, images, videos, and a forum.
http://www.gamespot.com/xbox360/action/blacksite/

GameSpy
Previews, screenshots, and movies.
http://xbox360.gamespy.com/xbox-360/blacksite-area-51/

GameZone
News, previews, videos, screenshots, and links.
http://xbox360.gamezone.com/gamesell/p31619.htm

IGN
Videos, screenshots, previews, news, press release, and a message board.
http://xbox360.ign.com/objects/849/849458.html

Team Xbox
Previews, movies, news, and screenshots.
http://games.teamxbox.com/xbox-360/1645/BlackSite-Area-51/

1UP
News, previews, screenshots, and videos.
http://www.1up.com/do/gameOverview?cId=3156233

Wikipedia
Article describing the story, graphics, gameplay, multiplayer, and demo.
http://en.wikipedia.org/wiki/BlackSite:_Area_51