Geist

FilePlanet
Includes a trailer and an E3 movie.
http://www.fileplanet.com/94228/0/section/Geist

GameFAQs
Release data and a message board.
http://www.gamefaqs.com/console/gamecube/data/914965.html

GameSpy
Includes movies, news, previews, and screenshots.
http://cube.gamespy.com/gamecube/geist/

GameZone
Preview, screenshots, news, and a description.
http://gamecube.gamezone.com/gamesell/p22295.htm

IGN
Offers news, previews, screenshots, and videos.
http://cube.ign.com/objects/566/566897.html