My documentary on the evolution of Wikipedia's heavy metal umlaut page has been the most popular screencast I've made (infoworld.com /2929). It investigates the sociology of Wikipedia-style collaboration, but it also explores the dynamics of the underlying version control system. To make the screencast, I first recorded a frame-by-frame walkthrough of all the revisions of the page. Then I loaded that movie into QuickTime and captured the raw footage, which I ultimately
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