I’m a few days late sharing this, but I thought I’d finish a Facebook-centric Friday with this update. This from Online Media Daily:

Facebook today announced cracking 300 million users worldwide and becoming “cash-flow positive.” The world’s largest social network had set a goal of being cash-flow positive sometime in 2010. “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,” wrote Facebook co-founder and CEO Mark Zuckerberg in a blog post.

Earlier this year, Zuckerberg also said the company expects to see 70% year-over-year revenue growth in 2009. Facebook board member Mark Andreessen recently estimated the company would hit $500 million in revenue this year.

The site continues to expand its audience at a torrid pace, adding 50 million users just since July and doubling in size since the start of 2009. About 70% of its users are outside the U.S.

Here are some interesting stats from eMarketer on the most current demographic breakdown of Facebook users.

If time wasn’t already flying past quicker than I can believe, this just added some dizzying acceleration. I remember doing a series of social media lunch and learns in March and April trumpeting Facebook’s ascent past the 175 and then 200 million-user mark. Here we are a mere five months later and 100 million users deeper.

I guess I have to start my Christmas shopping and get ready for the 350 million mark. Both will be here before I know what hit me.