I was going through an old folder of bookmarks this morning, trying to clear stuff out, when I came across a site I really used a lot a few years ago, Listen to a Movie. The site is still up, but I am not sure how often they are updating it. Still it is a great source for movie audio which can really make a long day at work move more quickly. I am listening to the UHF audio commentary right now.
Check out Listen to a Movie