This guy made an online album out of sampled youtube clips, and they are actually pretty catchy. I ran across it a few months ago, and went back and listened to a couple of them again today. I kinda like this one:
What’s cool is that you can go watch all of the source-material clips, and see how much or how little they resemble their portion of the finished product. Very creative!
Reminds me of..
This..
http://www.youtube.com/watch?v=o9698TqtY4A
or
This..
http://www.youtube.com/watch?v=JzqumbhfxRo