This might be of interest.
WikiTrust Evaluates Wikipedia Text by Author Reputation
Researchers at the University of California at Santa Cruz have built a test extension called WikiTrust that evaluates every word on Wikipedia and highlights text that was added by authors with a less than stellar reputation.
Judith K. Graves
Digital Projects Coordinator
Library of Congress
101 Independence Ave, SE
Washington, DC 20540-4604
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Virtual Programs & Services: http://www.loc.gov/rr/program/
Library of Congress: http://www.loc.gov/