I'm long and strong $FB via the IPO, but I think we're going to have a year of pain before we're in the clear. Facebook needs to prove that they can continue grow-- not an easy feat for a company with huge market share. I want to see Facebook redefine the market by developing better ways to monetize the social graph (duh!). I think mobile has potential, particularly outside of the US, but success will require great execution. It will be interesting to see if Facebook can retain talent with options priced off the public valuation and a stock that is stagnating (or worse, declining).