As quoted from the Facebook developer page:
How can I get an SEO boost from the comments left on my site?
The Facebook comments box is rendered in an iframe on your page, and most search engines will not crawl content within an iframe. However, you can access all the comments left on your site via the graph API as described above. Simply grab the comments from the API and render them in the body of your page behind the comments box. We recommend you cache the results, as pulling the comments from the graph API on each page load could slow down the rendering time of the page.
It would be much more beneficial if the comments were pulled directly from the Graph API and then cached so that their content is actually represented on the pages for crawling. This way FB comments can actually serve as a practical alternative for the traditional comment module.
Here is a blog post outlining how to accomplish this: http://developers.facebook.com/blog/post/490
I'll try to help out any way I can, but my coding abilities are somewhat limited.
Comments
Comment #2
ferdi commentedup
Comment #3
ferdi commentedThis is committed in dev version. The comments are pulled from facebook using graph api and printed behind the comments box. The result is cached for a configurable amount of time.
http://drupalcode.org/project/fb_social.git/commit/b20bace