Single Sign on for Facebook Comments
I am developing a custom CMS using Rails and would like to use Facebook comments for my members to comment.  Does Facebook comments have **single sign on** so that my members can use their accounts (pictures and name) on my website to make comments?  That way their member name and picture will be shown in the comments.  Will their member name and comments be able to link to their about page on my website?

If not will you please recommend a commenting system that will be easy to implement and offer **single sign on**.  Disqus is nice but not worth **$300** a month!
Single Sign on for Facebook Comments
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I am developing a custom CMS using Rails and would like to use Facebook comments for my members to comment.  Does Facebook comments have **single sign on** so that my members can use their accounts (pictures and name) on my website to make comments?  That way their member name and picture will be shown in the comments.  Will their member name and comments be able to link to their about page on my website?

If not will you please recommend a commenting system that will be easy to implement and offer **single sign on**.  Disqus is nice but not worth **$300** a month!