Facebook: "We're cash-flow positive"

Buried in the fourth paragraph of a blog post from Facebook CEO Mark Zuckerberg today was the news that really mattered - the company is making money. In that post, Zuckerberg writes:

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.

Buried in a blog post or not, that's good news for the company to put out there as it maintains its momentum of growth in membership and in offerings. The company recently announced a milestone of 65 million mobile users and said that, among those mobile users, active usage on the site doubles.

Today, in its big headline, it said it surpassed the 300 million subscriber mark and that will "continue building new and better things to make connecting with the people you care about as easy and rewarding as possible."