Contra 4

GameSpot
Reviews, news, previews, images, videos, and a forum.
http://www.gamespot.com/ds/action/contra4/

GameSpy
Provides information, previews, and screenshots.
http://ds.gamespy.com/nintendo-ds/contra-4/

IGN
Videos, screenshots, previews, news, and a message board.
http://ds.ign.com/objects/944/944841.html

1UP
Provides information, news, previews, features, images, and videos.
http://www.1up.com/do/gameOverview?cId=3160432

Wikipedia
Article describing gameplay, music, and bonus features.
http://en.wikipedia.org/wiki/Contra_4