Facebook has just announced it has reached 300 million monthly active users around the world.

Facebook’s global audience has doubled since the beginning of the year, adding 150 million new users since January. Notably, over 71% of Facebook’s userbase resides outside the United States – as of today, the company reports 85 million active American users.

Perhaps even more impressive is that the company also says it is now “free cash flow positive.”
From the company blog post on the news, from founder Mark Zuckerberg:

"As of today, Facebook now serves 300 million people across the world. It's a large number, but the way we think about this is that we're just getting started on our goal of connecting everyone.

Because we want to make it as easy and fast as possible for the world to connect, one of the things we think a lot about is how to make Facebook perform even faster and more efficiently as we grow. We face a lot of fun and important challenges that require rethinking the current systems for enabling information flow across the web.

The site we all use every day is built by a relatively small group of the smartest engineers and entrepreneurs who are solving substantial problems and each making a huge impact for the 300 million people using Facebook. In fact, the ratio of Facebook users to Facebook engineers makes it so that every engineer here is responsible for more than one million users. It's hard to have an impact like that anywhere else.

We're also succeeding at building Facebook in a sustainable way. Earlier this year, we said we expected to be cash flow positive sometime in 2010, and I'm pleased to share that we achieved this milestone last quarter. This is important to us because it sets Facebook up to be a strong independent service for the long term.

Over time, Facebook will continue to be as strong as all of the connections you make. We'll continue building new and better things to make connecting with the people you care about as easy and rewarding as possible. We thank all of you for helping us reach the point where we are connecting 300 million people, and we hope to serve you and many more people in increasingly deep and innovative ways in the months and years ahead."