CAPTCHA, what is it good for?

Smashing Magazine has posted up an excellent blog post on Captcha called In Search of the Perfect Captcha.

When CAPTCHA is implemented, the end users are often neglected and not surpraisingly the following are often sacrificed:

Before jumping to the trap of “if Google does it - it must be good” kind of thinking and implement CAPTCHA blindly, consider a couple of things first: