Criminal Minds Online
Includes show commentary, episode guide, photos, cast and character information, reviews, and forums.
http://www.criminalmindstv.com/

IMDb: Criminal Minds
Cast biographies, crew details, user reviews, quotes, goofs, soundtrack and production information.
http://www.imdb.com/title/tt0452046/

CBS: Criminal Minds
Show summary, cast biographies, profiler quiz, and video clips.
http://www.cbs.com/primetime/criminal_minds/

Yahoo! Groups: Criminal Minds
Show, cast, character, and episode discussion. [Yahoo! registration required.]
http://tv.groups.yahoo.com/group/Criminal-Minds/