GATSBY was made into a pretty deent opera about six years ago. Played two seasons at the Met.
Okay, my cotribution to this thread subject that will never die (At one point when I was here four years ago, someone suggested Hawking's History of the Universe -- but hey, whatever...):
For you ROCKY HORROR fans, the DVD of a sorta kinda sequel was released this week, SHOCK TREATMENT. It's the continuing story of Brad and Janet's now-troubled marriage, has a score by RH's Rochiard O'Brien, and featured many of the actors who were in the previous movie.
Flat out: this thing *screams* for a stage production, especially now. Written and produced in 1981, it's set entirely in a TV studio and deals with, surprisingly enough, reality TV and its affects on people. It's an amazing piece of work -- self-contained, hysterically funny, with some seriously kick-ass music. The film looks like it was shot last week, not twety years ago.
All you nascent producers out there, check into this. It's a goldmine waiting to happen.
http://docandraider.com