Animated CAPTCHAs

Today I learned that animated CAPCHAs exist.
Built with flash. Animated. Readable. Kinda useful.

Specifically:

• easier for human
• harder for computer

Can’t crowdsource OCR anymore, though… But maybe this will inspire crowdsourcing of something else, that only human capable of?

Found in http://www.addthis.com/ email forward feature.