http://www.metacafe.com/watch/1346392/ghost_playing_the_piano/
Ok the papers moving off the piano are very easily faked (the camera even moves to the left, you can't see the right side of the piano).
And it's really nice how the video ends abruptly.
Also, the piano playing is of course easily faked, just dub in a sound track to the film.
What I want to know is how did he get the purplish hazy being at the piano? Is there a video feature in software which allows you to "transparency" a person or what? This is the part of the movie which seems like it'd be hard to do.