Updating as this plays out with deeper analysis and links… Just a few moments ago, Facebook officially filed an S-1  for an initial public offering seeking to raise $5 billion. Here are a few key findings… – 845 million monthly active users, year over year growth of 39% – 483 million daily active users as of December, year over year growth of 48% – 425 million monthly mobile users – 100 billion friend connections as of December 31, 2011 –…