The moment the tech industry at large has been waiting for with bated breath is about to transpire. According to the Wall Street Journal, Facebook is planning to file for its IPO next Wednesday. Did I mention it's expected to be the largest public offering in tech history? Well, you probably already knew that. Analysts are anticipating a valuation between $75 billion and $100 billion for the social networking behemoth. On Wednesday, trades for Facebook shares were halted on the secondary market.