Advanced comments provides a more powerful commenting system for your site. It is modified from the original guestbook. It is basically a collection of code and custom templates I have collected from users on the forum or wrote. 

NEW IN 2.0

RTF Support

Combined ajax into standard template

NEW IN 3.0

Improved interface

Version 3.0 submitted by hereNT! If you like his improvements why not thank him by buying one of his addons?

• More captcha options (recaptcha by phallanx, honeypot, and mathcaptcha by ideaday)
• Reload default captcha with a new image
• Close comments after a period of time
• Placeholder elements for the commenting fields
• Odd/even classes to allow for zebrastriping look
• Show user avatars (chadstrat)
• Ajax posting (revolutium studio)

http://screencast.com/t/3oUEM5AsEDAF