You need to be asking these questions I think.
1. Does a link to your site from a facebook page pass PR
2. Does a link to your site from a facebook page help your SERP position
I would like to know aswell.
Cheers
Spaceman
nope. they are not
Links from Facebook, Twitter etc = New generation SEO as they are based on likes of users.
So yes, they do help. Just 7-8 days ago, i came across a post which stated that they ranked for the term "beginners guide" in google just with tweets.
Read this:
1. Does a link to your site from a facebook page pass PR
2. Does a link to your site from a facebook page help your SERP position