http://online.wsj.com/article/
Wikipedia.org is the fifth-most-popular Web site in the world, with roughly 325 million monthly visitors. But unprecedented numbers of the millions of online volunteers who write, edit and police it are quitting.
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"People generally have this idea that the wisdom of crowds is a pixie dust that you sprinkle on a system and magical things happen," says Aniket Kittur, an assistant professor of human-computer interaction at Carnegie Mellon University who has studied Wikipedia and other large online community projects. "Yet the more people you throw at a problem, the more difficulty you are going to have with coordinating those people. It's too many cooks in the kitchen."
