Shadow the Hedgehog

Dan-Dare.org: Shadow the Hedgehog Flash Online Game
An official Shadow the Hedgehog Flash mini-game written by Sega's Sonic Team.
http://www.dan-dare.org/FreeFun/Games/ShadowHedgehog/ShadowHedgehog.htm

GameFAQs
Release data and a message board.
http://www.gamefaqs.com/console/ps2/data/926671.html

GameSpot PS2
Previews, news, movies, screenshots, and links.
http://www.gamespot.com/ps2/action/shadowthehedgehog/

GameSpy GameCube
Preview, movies, and screenshots.
http://cube.gamespy.com/gamecube/shadow-the-hedgehog/

IGN GameCube
News, previews, FAQs, screenshots, and videos.
http://cube.ign.com/objects/734/734824.html

Team Xbox
Preview, movie, screenshots, and news.
http://games.teamxbox.com/xbox/1119/Shadow-The-Hedgehog/

Wikipedia
Article with pre-release comments, confirmed features, and gameplay information.
http://en.wikipedia.org/wiki/Shadow_the_Hedgehog_%28video_game%29