We have one Facebook fan page and two personal profiles that could be sending traffic and then there are the many facebook pages of friends etc. I am also running an ad campaign from my FB account for my husband's business which has a link from his personal FB profile and his fan page.
On Google analytics for his business we get the following referring sites from Facebook:
/ajax/emu/end.php which is listed under facebook.com / referral
/l.php (which is a not-found page at FB
/ajax/emu/end.php which is listed under apps.facebook.com
Both of the working links send me to the home page of my profile, which is the account I am working from to create and review the FB ad campaign that we are running.
Is this info telling me any useful information at all? Is there a best practice for tracking and analyzing Facebook traffic that is a lot more granular?