Visit the Official Site

Music Score:
Whether this can be classed as a 'hidden' feature is debatable, but it certainly isn't advertised on the box.
From the main menu, go to "Bonus Materials", then select Photo Gallery. A short set of images will cycle round and round, but leave the Gallery running and you'll hear all of Carter Burwell's excellent musical score for the film- all 33 minutes of it!
Reported by: Alan Holding