Facebook has two very big pieces of news that they announced today at TechCrunch50. The first: They have crossed 300 million users worldwide now, extending their lead as the biggest social network. The second: They are now cash flow positive. Yes, from this point forward, Facebook is making money…

Facebook dominates the social networking landscape when it comes to membership and mindshare, but many have speculated that the company’s focus on user growth has strained its ability to ever turn a profit. On Tuesday, those concerns were momentarily quieted as Facebook announced that it’s now free cash flow positive…