Social media signals from Facebook comment plugin on your site?

[ProjectLabs]

If you are using the Facebook social plugin on your site like ThinkGeek does for comments:

http://www.thinkgeek.com/product/ed6b/

Are there any positive social signals from people leaving comments that could impact the SEO of the page?

I searched the text of some comments in quotations in Google and it appears that the first few comments are indexed but most are not.

[Dr-Pete]

I haven't seen much in the way of data on this. As @ReferralCandy said, I believe that at least some of the comments are indexed and they may count as page content, but I don't think the association with Facebook gives you any particular boost. More likely, the gain would be from crossing your blog community with the Facebook community and possibly increasing your engagement and secondary social signals.

I have mixed feelings about the Facebook commenting platform, but most of that's around ownership, not SEO. Seems like some fairly large sites are using it.

[EastEssence22]

Referral traffic from facebook to your website is important. Not where you have embeded plugin.
Think for engagement and more inbound initiatives like facebook

Regards
SAMEER

[ReferralCandy]

Comments made using Facebook Comments plugin can be indexed by Google, so akin to the default comment box, they are all considered as User-Generated Content and treated as positive social signals towards the SEO of the page. An advantage I can see from using Facebook comments is that users can share comments they made on their own profile, thereby exposing your comments to more people and encourage more people to comment on your page.

I'm not entirely sure if Google indexes all the Facebook comments made, or only the top comments. If the latter is true, it is a good sign since only popular (or quality) comments will be indexed as part of your page.