The John Williams Fan Network revealed today that the composer's score for Harry Potter and the Prisoner of Azkaban would include multimedia that can be played on a computer:
According to a note sent to CD retailers: "This is an Enhanced CD, which contains both regular audio tracks and multimedia computer files. Original score composed and conducted by John Williams."
Play.com has also listed the movie's song titles.
Warning: Song names might be construed as spoilers for the movie, so read at your own risk.
For the record, this finally puts to rest worries that Quidditch would not be seen in the film, as there's a song on the album specifically for it. (All that's really missing is Oliver Wood.)