Facebook IPO filing this week, valued above $75 bil.

Papers for Facebook’s initial public offering could be filed as early as this week, with a possible IPO target set for sometime between April and June. According to WSJ, FB could raise as much as $10 billion, with the value of the world’s biggest timesink coming in at between $75 billion and $100 billion. That would make this one of the biggest debuts for a U.S company. $100 billion would make Facebook worth about the same as McDonald’s.

WSJ says that a $10 billion Facebook offering would put the company in fourth among U.S. IPOs, coming in right under Visa, GM and AT&T. It would be the largest internet offering ever, eclipsing Google’s $1.9 bilion back in 2004.

We’ll see if Facebook is even profitable. If even a small chunk of the 800 million Facebook users are buying virtual goods in games, they have to be making a fair bit of money.