Watch this fantastic talk if you haven't seen it already: http://video.google.com/videoplay?docid=-8246463980976635143 http://video.google.com/videoplay?docid=

Watch this fantastic talk if you haven't seen it already: http://video.google.com/videoplay?docid=-8246463980976635143 http://video.google.com/videoplay?docid=-8246463980976635143 He randomly pairs players in games to complete boring tasks (e.g., tagging photos) in a fun way (e.g. Predict what the other person is thinking).