Slightly related, but if you haven't yet seen Luis von Ahn's TED talk on reCAPTCHA, I recommend it highly: http://www.ted.com/talks/luis_von_ahn_massive_scale_o

Slightly related, but if you haven't yet seen Luis von Ahn's TED talk on reCAPTCHA, I recommend it highly: http://www.ted.com/talks/luis_von_ahn_massive_scale_online_collaboration.html http://www.ted.com/talks/luis_von_ahn_massive_scale_online_c...