About ten years I ago I had the pleasure of being the engineering lead on a very ambitious project by Chris Butler called "The Devil Glitch." Released in 1997, it made into the Guinness Book of Records as the longest pop song ever.
We've been working all summer and are very close to releasing "The Major Glitch"... an online, appendable, collaborative, ever-growing version (more about it on Chris' blog).
This thing is going to be serious fun! Chris is starting to take in submissions from all over and we'll be posting click tracks and submission guidelines when the site goes live.
-s