Graham found a purpled version of Cory Doctorow's DRM talk
I prefer the wikid version myself.
But it's interesting that the plurality of online formats really makes Doctorow's point about eBooks. I can forsee a day when books will have a PurpleWiki mix, a MoinMoin mix, a MovableType mix etc.
But I don't entirely buy the purple numbers thing. More on ThoughtStorms:PurpleWiki