Would love to hear your feedback about this tech:
http://nthinking.net/miss/pictcha.html
Pictcha is a protection in a form of an image retrieved from UTYP engine, which can be embedded inside Web Forms, and which will filter out various spams in a more user friendly way than the well known captchas.
And as a bonus, it is learning. Thus it recycles the tremendous waste of concentration which is the conventional Form Validation by text recognition.
You may check the lab page to get more details about it:
