GameFAQs - Release data and a message board. - http://www.gamefaqs.com/console/ps2/data/926671.html
Wikipedia - Article with pre-release comments, confirmed features, and gameplay information. - http://en.wikipedia.org/wiki/Shadow_the_Hedgehog_%28video_game%29
Team Xbox - Preview, movie, screenshots, and news. - http://games.teamxbox.com/xbox/1119/Shadow-The-Hedgehog/