Well, I'm just surprise that when I checked the traffic of my site I get almost 20% from the facebook.
I dont really think you can get backlinks from Facebook I know Alexa doesnt count them. But I have seen them count Twitter.
yah, you can get traffic from facebo0k, twitter and other social networking sites but not get any page rank value coz these are no follow site. if you want high page rank backlink so you should try directory submission, social book marking and blog commenting is easy way to get your page rank high.. Thanks Pushpendra
Facebook, twitter and similar other social networks are being used to increase the traffic in your site. I think, no one try to target backlinks from them rather attracting target traffic is more useful.
Facebook and twitter are using nofollow attribute so linking in this site not so helpful for PR but very effective to get traffics. If you have more traffics in your website google might give you priority in SERP.
You can't get backlinks that increase your PageRank... you can get backlinks that drive more traffic to your site.
Backlink from facebook or twitter is count as nofollow, that means its just waste of time. yes fb or twtr can drive traffic.
When someone likes your fb page it creates a internal link on their wall, which is technically a backlink, just does not pass juice
Facebook and twitter are the social networking site which will help for increasing traffic.to back link your Facebook and twitter you must Create your business fan pages , get as many real and active users to it and tweet different people twitter post.