When Google rolled out v2.0 of their reCAPTCHA service I got a nice email from them reminding me to upgrade. Since I like shiny new things and have a liberty of freely implementing them they needn't ask me twice to do so. As for what's new and shiny in it - they market is as noCAPTCHA reCAPTCHA, meaning no more typing hard to read text from an image we all got used to. You get a nice checkbox-like thing instead, and they are able to tell from the way it's ticked whether it was of human doing for most of the time. When they are not able to tell, you might get tormented to click food pictures instead, which to me happens especially often whenever I decided to skip my lunch. Still better than trying to decipher a cryptic piece of text I think.