The Facebook Connect world just keeps on getting better and better, not only do we have the wonderus Facebook connect core, we now have widgets for nearly every blogging platform and on top of that FB have released a new comments widget that can plug directly into your site with little effort and code.
With the Comments Box, Facebook users on your site can comment on your content, post those comments to their profiles, and share them with their friends on Facebook. The Comments Box allows non-Facebook users to make comments on your site as well. And via their APIs, you can access related comments made on Facebook as well to bring the conversation together.
The Comments Box comes with additional social features:
- Fully customizable: Specify background color, text color, and other attributes by providing your own custom CSS to incorporate this best into your site.
- Access to raw data: Query all comments via the comments.get API method or the comment FQL table.
- Administration and moderation: Manage the privacy and permissions of your comment boxes on an individual or global basis.
- Integrates seamlessly regardless of whether you do or don’t have Facebook Connect already on your site.
So as you can see it is pretty powerful, and you can get more info, plus the code from the Facebook Blog



