It is getting to be award season time so now all that shadow politicking is going on for who's movie gets nominated for what. One of the ways the studios help out is by putting up websites like this one. It's advertising for Ted, Snow White and the Huntsman, This is 40, The Lorax, and Les Miserables. All but the screenplay for Les Miserables is online as a pdf. I suspect that will get updated once the movie actually comes out. I'm actually kind of interested to read This is 40 after I see it.
UPDATE: Here is a link to more scripts.