
I could have sworn that I heard an Arvo Part piece during Fahrenheit 9/11. Sure enough, the closing credits listed "Cantus in Memory of Benjamin Britten". Nice.
A funny use of music in Fahrenheit 9/11 was when Dubya's National Guard records were on the screen showing that he 'missed' his physical exam and was grounded from flying. For just a few seconds during the close up, the guitar riff from "Cocaine" rocked the house. Heh ... 'nuff said.