The Official Matthew Sweet Site: Rarely updated, sadly...

http://matthewsweet.com/ 

Matthew Sweet on MySpace.com: Sign up and let Matthew know how many fans he has online!

http://myspace.com/therealmatthewsweet

The Matthew Sweet Discography: The site for the Matthew Sweet completist!

http://idiot-dog.com/music/sweet.matthew/

The Matthew Sweet Setlist Database: Another great ressource!

http://www.angelfire.com/il2/sweetsounds/sl1.htm

Anita's Matthew Sweet Site: Pictures, news, articles and more!

http://www.matthew-sweet.com/

Matthew Sweet Chord Archive: 

http://zenandjuice.com/music/matthew_sweet/index.html