Everyday, more than 60 million people play one of Zynga Inc.’s games available on social networks like Facebook and MySpace. The company, whose popular games include FarmVille and Mafia Wars, recently raised $180 million and its annual revenue is said to be anywhere from $100 million toEveryday, more than 60 million people play one of Zynga Inc.’s games available on social networks like Facebook and MySpace. The company, whose popular games include FarmVille and Mafia Wars, recently raised $180 million and its annual revenue is said to be anywhere from $100 million to more than $250… More»