Sam linked to this screenplay over on Rumbles. For lack of anything to do, I read through it.
It's a pretty good story, at least from the looks of the screenplay. Dunno how well the movie (from what I gather it's a fairly old movie?) did, but the original story is good. The allegory/references to the whole Garden of Eden thing and the reflection on the U.S. in the 50's-60's, etc, came across quite clearly, and fit pretty well with the plot.
It's a long document, sure, but I think it's definitely worth a read. Just think of it as a multi-chapter fanfic. :p
Addendum: Oh and the funniest/weirdest thing about the screenplay? The name of the main female character's alter-ego is "Mary Sue", and she's the one who sets the plot snowballing. I can't tell if whoever wrote the screenplay has never heard of fanfiction all his life when he came up with the name... or if he knew exactly what he's doing.