Facebook on Wednesday formally filed documents with the U.S. Securities and Exchange Commission in its first step toward an upcoming initial public offering. Facebook said it is looking to raise $5 billion with its IPO, which has been eagerly anticipated by the Street and by investors. Morgan Stanley, JPMorgan Chase, Goldman Sachs and others will underwrite the offering, and Facebook could raise as much as $10 billion following its IPO. Reports surfaced this past Friday stating that Facebook had plans to fi...