The Modern Humorist website (http://www.modernhumorist.com/
) recently put up their "Summer Movie eView", which includes five parody songs which you can download as MP3s. The songs are quite funny, and worth checking out. They include Randy Newman's theme to MISSION IMPOSSIBLE 2, Elton John and Tim Rice's song from THE PERFECT STORM, and others.
The page can be reached directly at http://www.modernhumorist.com/mh/0005/movies/songs.cfm.