Man, that was one I loved as a kid, great movie. And who else but The Dude in The Duke's role? http://movies.yahoo.com/feature/movie-talk-iconic-john-wayne-role-redone.html
Can't wait to see it - I'm sure they'll bring out the darker side. The article mentions they'll stay truer (than the original) to the novel. I haven't read it so no comment there. But IMHO, the Coens are greatness and can do no wrong.