The Sound(track) of No Country for Old Men

Look at that picture and tell me what sounds come to mind. The wind? Sound of boots crunching gravel? Nothing more than the rhythm of land and man co-existing, right?

Now tell me if I'm wrong, but I swear that's pretty much all there is to the soundtrack of No Country for Old Men, the Coen Brothers' adaptation of Cormac McCarthy's novel.
I've talked with about six other people who have seen the movie only once, and they've all said the same thing: "Dude! About halfway through the movie, I realized there was, like, no soundtrack at all!"
Obviously, the Coen Brothers aren't the first filmmakers to do this, but it's proof of what masters of their craft they are. They built a natural soundtrack out of little but the rhythms of landscape and language. Unbelievable. Either that, or they just figured there was no way to top Ry Cooder's Paris, Texas soundtrack. Then again, maybe this was their way of topping it...