So, if CAPTCHA's on the way out, what comes next? [closed]

Question

With text-recognition improving and CAPTCHA-breakers using Mechanical Turks to break otherwise unbreakable keys, what's the next technology to keep scripts from spam-botting a site that relies on user input?

Answer 1

I like the concept of an 'Invisible Captcha'. Phil Haack details one implementation here.

This banks on the fact that bots, spiders, and crawlers don't implement javascript engines. This too could change in the near future.