=====ReCaptcha Comment Form=====
I've created a package that integrates the ReCaptcha PHP library with the wikka comment form to help deter comment spam.  It does not alter any of the core wikka code, but requires additional plugin library and other modifications.

For full details on installation as well as a demo, see
http://klenwell.com/is/WikkaRecaptchaCommentForm

Comments and suggestions are welcome.