Hi! I'm quite sure, a lot of professionals should be here, so, please, guys, take a look at my project: http://gestcha.com - it's a hand gesture CAPTCHA prototype, that I finished recently (it works). Please, tell me, could it be useful or just a waste of time?
P.S. Please, don't tell me, that all kinds of CAPTCHA are bad bad things, which should be banned. I know it pretty well