Guitar Hero II

CCG
Provides a list of cheats and unlockable songs.
http://www.cheatscodesguides.com/xbox-360-cheats/guitar-hero-2/

GameFAQs
FAQs, cheats, saved games, reviews, images, and a message board.
http://www.gamefaqs.com/console/ps2/data/932565.html

GameSpot
Reviews, news, previews, images, videos, cheats, and a forum.
http://www.gamespot.com/ps2/puzzle/guitarhero2/

GameSpy
Review, previews, cheats, news, screenshots, and movies.
http://xbox360.gamespy.com/xbox-360/guitar-hero-2/

IGN
Videos, screenshots, cheats, FAQs, reviews, previews, news, press releases, and a message board.
http://xbox360.ign.com/objects/857/857449.html

Team Xbox
Reviews, previews, cheats, news, and screenshots.
http://games.teamxbox.com/xbox-360/1567/Guitar-Hero-II/

Wikipedia
Article describing development, gameplay, soundtrack, reception, technical issues, and future games.
http://en.wikipedia.org/wiki/Guitar_Hero_II