[jcr]

Though a bit more on the "actual implementation" side of things, there's an Australian group called "Axis Of Awesome" who did an interesting song called "Four Chords". It shows the use of a set of four common chords in a lot of different songs.

http://www.youtube.com/watch?v=oOlDewpCfZQ

[davidedicillo]

This is exactly what I thought about when I saw the article :)

[dirkk0]

... and still nobody wrote 'Pachelbel' yet. :-)