A collaborative story written by 140 different elementary and middle school students across the globe using Twitter.com.
Each student used the same @manyvoices Twitter Account. to contribute their 140 (or less) characters. The story concluded at the 140th entry. At that point, we collectively edited and revised our little Twitter story before publishing it as a small book through Lulu.com.
Kind of brings the whole, write a line and pass it on exercise into something that is global.