Thanks, I really dig stuff like that. A band I played with used to come up with different ways to merge songs together. We'd be playing one song and throw in words or riffs from another song for our own amusement and to see if anyone noticed.
I have a bootleg mp3 from A Perfect Circle show where they mix/mash Ozzy's "Diary of a Madman" and The Cure's "Love Song", music and lyrics all mixed together. Pretty awesome (despite the poor sound quality).