If you short FB you will lose big time period.
I would not surprise that FB will rise to $32 this week.
FB fair value line between $32 - $55 from January 2013 - Dec 2013.
FB fair value line between $55 - $75 from January 2014 - Dec 2014.
FB target value at $100 in 2015.
This is very conservative estimate for the most valuable company in the world.
FB soon will have 2 billion users and they all have Smart phone.
FB currently designed and developed Mobile Web APP and it is very useful for FB users and company that advertise with FB.
BUY and STAY with FB.