This report comes from the Official Star Wars Site!
Answered by: Steve Sansweet

Did George Lucas intend for Boba Fett to die in the sarlacc, despite what others may say or print?

Yes, in George's view -- as far as the films go -- the baddest bounty hunter in the Galaxy met his match in the Great Pit of Carkoon where --unfortunately for Mr. Fett -- the ghastly sarlacc made its home.

However, Lucas also approved Fett's comeback in the expanded universe. And of course, by going back in time with the prequels, the Star Wars creator has brought Boba Fett back to life himself, albeit at a much younger age.