On the most recent This American Life, which is playing in the background right now they just used a snippet of one of my favorite pieces of music in there.
Comptine D'un Autre Été: L'après-midi, my absolute favorite piano piece ever. It was composed by Yann Tiersen and was used in the movie Amélie.
Love that song. LOVE. I love the entire music track to Amélie, but that is my favorite.