you have to wait for new upcoming features
Upcoming Features↑Top
•Option to allow the Facebook comments box to be included before or after the WordPress comments
•Ability to import Facebook comments into the WordPress database and vice-versa
•Option to specify an image to be used in the link that’s generated on Facebook when the Like button is clicked
•Option to link to a landing page instead of to the post a comment was made on
actually you can import facebook comment by
https://graph.facebook.com/comments/?ids={YOUR_URL}
Graph API to pull comments
Comments can now be searched and exported so developers and website owners can highlight the most interesting comments, perform analysis on the comment stream, reward top commenters, search through existing comments, and use comments to improve SEO on their site. For example, a news site could highlight the most popular comments or display an info-graphic comparing the number of “pro” vs. “con” discussions created on a political topic.
Comments for every URL can be accessed via the Graph API:
read here to see how – http://developers.facebook.com/blog/post/490
i know the method but i dont know how to write php function to insert facebook comment into wordpress database so i just wait for this plugin to update this feature
