One of the great things about digital media and the internet in recent years is the remix culture. One of the best I have seen is the 10 Things I Hate About Commandments which I found via Sivacracy.net
Of course if the big media companies had their way, no one could create works like this without paying insane amounts of money for the privilege of using the footage from the film. This kind of creativity is why the current copyright law needs to be rolled back and restricted not expanded. Clips like this clearly demonstrate the need for the public domain.