Let’s point out something that the folks at SlashFilm have already pointed out (with lots of disclaimers to cover their butt: “we may have pointed out how to download these, but we would never!”).
In their piece about “American Gangster” leaking online, there’s a curious part at the bottom that almost has nothing to do with the piece other than the concept of things leaking early. But they’ve noticed that the Paramount Vantage site has uploaded free pdf versions of five screenplays to a public “For Your Consideration” website. Threee of the scripts available for download (“The Kite Runner,” “Margot At The Wedding” and “There Will Be Blood”) have not yet been released theatrically, but are available for you to read at your leisure (scripts for Sean Penn’s “Into The Wild” and Angelina Jolie’s “A Mighty Heart” are available too).
Actually, not all of them are linked/downloadable yet (“There Will Be Blood” for one), but as one astute person in the comments section points out. “all of the scripts can be downloaded via that site. Not all are linked, but they all follow the same file structure/naming convention,” and the direct link to Paul Thomas Anderson’s “There Will Be Blood” script is available (Or fuck it, you can just click here for the PTA film the others should be easy and obvious).
Now since these are being offered up by Paramount Vantage on the web, there’s seemingly nothing illegal about them. Either way, the information is there, so have at ’em and read ’em if you don’t mind the spoiler factor.