The movie is supposedly based (loosely) on the rise of Scientology, with Phillip Seymour Hoffman playing a L. Ron Hubbard inspired religious leader in the 1950s. The trailer looks potentially interesting. I have not seen the film yet, although I did like There Will Be Blood.
Anderson reaches out to Tom Cruise...
Update II (via Crack):
Not that you had any doubts, but it is all about L. Ron Hubbard and Scientology
Update III: L. Ron Hubbard's great grandson blasts Scientology