"Search engines powered by crowdsourcing" : http://www.techcrunch.com/2007/10/21/powerset-testing-results-at-mechanical-turk/ http://www.techcrunch.com/2007/10

"Search engines powered by crowdsourcing" : http://www.techcrunch.com/2007/10/21/powerset-testing-results-at-mechanical-turk/ http://www.techcrunch.com/2007/10/21/powerset-testing-result...