"FlashForward uses Mos Def's Quiet Dog in film score! (link)"
Just posted these links at the Popcorn section, but I'll pass along the info here as well. ABC's new serial drama FlashForward premieres tonight and they posted the first 18 minutes to their first episode. Mos Def's song Quiet Dog is played during one of the scenes, starting at the 5:00 mark and goes on for a couple of minutes (right before the car chase scene).