Synecdoche, New York
I'm searching for the script for Charlie Kaufman's upcoming Synecdoche, New York, about a theatre director who may be dying or may be going crazy, or both, who, among other things, is building a life-sized replica of New York in a warehouse for his latest play. I'm sure the description is much like saying Being John Malkovich is about John Malkovich playing a life-sized puppet of himself, because there are many other elements, like stories within stories and time jumps. Check the links below for all the info.
Reviewed on Ain't It Cool News
CHUD.com post (stands for Cinematic Happenings Under Development, watch out for pop-ups).
Synecdoche Wikipedia entry
Jay Hernandez's Los Angeles Times review of the screenplay
BeingCharlieKaufman.com main page
From what I can tell, it has the key elements of a Kaufman film-- self-referential scenes, a lonely guy who can't quite connect with women, obsessive hobbies--