One of 31 video segments featured in 'Designing Media', the new book, DVD and website by Bill Moggridge.
More info on 'Designing Medi'a available at http://www.designing-media.com
Jimmy Wales, the founder of Wikipedia, who has harnessed voluntary contributions from anyone with sufficient interest and time to create the world's largest encyclopedia. He has evolved a hierarchical structure that benefits from the combination of automation and human judgment; the software is enhanced through the emergence of social rules and norms for interaction, which bring members of the community together to do something enjoyable and productive.
More info on Designing Media available at http://www.designing-media.com