WordPress.org

This plugin will allow you to completely customize your comments system layout. By default this will change your current comment system to an amazing comments system like facebook. It looks same as facebook wall's comment system. People can "Like/Unlike" any comment and they can also share any comment on twitter as tweet. Fully ajax based comment system and makes your comments section easy to load.

Features:

• Download, Upload and Activate
• Fully control over customization of layout
• Multiple pretty themes
• Ajax based working
• Easy to load comments with animation (fade In effects)
• Share your comment on twitter
• Gravatar support
• Reply,Like,Unlike and See all comments of a single User
• Change back color, font size and font color of comments panel
• Change the number of comments on a page
• and much more..

There were some path issues with FCP but now its fixed. This plugin can produce conflict with some other AJAX comments plugin. You should deactivate others to test this amazing plugin.

http://www.99points.info/ (Check out comment section of my blog)