Fast-growing social network Facebook lost its music partner, iLike, to a super-cheap $13.5 million buyout by rival MySpace last month. Since then, tech industry watchers have been looking for signs that Facebook has lost its momentum and, less measurably, its coolness on the Internet.

That’s probably why Facebook’s marketing people chose  today’s TechCrunch50 conference, an event focused on emerging startups rather than billion-dollar businesses like Facebook, to make two announcements: First, Facebook  has passed the 300 million user mark, up from 200 million in April. Second, the company claims it is now cash-flow positive. In non-accountant terms: Facebook is making money.

The numbers show the social network’s growth is accelerating: they added 50 million users in two months. (It took them 3.5 months to go from 200 to 250 million users). They have a Developer Garage at the TechCrunch50 conference in San Francisco. I’ll post as I learn more.

The company also accidentally released a peek at some upcoming features on its Twitter account. It’s launching a Google Labs-like space called “Prototypes” where they can test out features that will slowly be introduced to the site at large. Some of the projects they’re testing out include desktop notifications (which would add some functionality that’s similar to Tweetdeck and other Twitter clients that automatically alert you when there’s fresh content). There’s also an enhanced event concept, that would sync with your Outlook account and calendars.

Read the original article at Venture Beat:
TC50: Facebook cash-flow positive, 300 million users, may launch Google Labs-like “Prototypes”