Information about Facebook, once closely guarded, are beginning to dribble out, a consequence of the Goldman Sachs-led investment round that has valued the social networking company at $50 billion.

Here are the four most important new or intriguing nuggets being reported about Facebook. They are based in part on reporting on the 100-page private placement memo circulating to potential investors this week.

* Facebook said it intends to go public by April 2012, or to begin disclosing financial information by then, as our Deal Journal colleagues reported this afternoon.

* Facebook's revenue for the first nine months of 2010 was $1.2 billion, and net income over the period was $355 million, Reuters said. Those figures are from unaudited financial statements, Reuters said.

* Facebook had net income of $200 million in 2009 on revenue of $777 million, The Journal has reported.

* Facebook has more than 600 million monthly active users, of whom more than 230 million access the site on mobile devices, reported Bloomberg, based on the offeringdocument circulating to Goldman Sachs investors.