It's not all good. Facebook employees are locked up for 3 months right? So the winners here were the VC's and other "preferred stock holders" who were allowed to sell their stock as part of the IPO. And the banks/underwriters who apparently always profit from ipo's even if they are mispriced.
The losers for the most part were retail investors and various funds/traders who believed the banks that the IPO was correctly priced, and probably facebook employees who will have to sell at a lower price now because this botched IPO has sown a lot of distrust in facebook stock.
The goal for an IPO is to correctly price the offering. Usually tech stocks are wildly over-valued and speculated on when they IPO, that doesn't make the banks wrong for setting a reasonable price.
Shrug it's all bullshit anyway. When your talking in the scale of billions of dollars, capitalism can get pretty inefficient. Internet bubbles just highlight the most absurd parts of it. $1B for a 1 month project on iOS(instagram)? $100B for a monopoly on the social graph?(facebook) It makes no sense, but it's really just the tip of the iceberg when it comes to market inefficiencies and the huge amount of capital some companies have compared to the value they provide to society.