Social game company Zynga has revealed its plans for an IPO come December 16th or so, which has lead to the general market taking a long, hard look at the FarmVille creator. Although Zynga was valued at around 20-billion-with-a-damn-B, that estimate has since fallen to a mere and insignificant 10-billion. A brutal release schedule has resulted in several of the company’s newest games running over each other, as well as an increase in employee dissatisfaction. Industrygamers has the story.