Note from Mark Zuckerberg on October 4, 2012:
This morning, there are more than one billion people using Facebook actively each month.
If you’re reading this: thank you for giving me and my little team the honor of serving you. Helping a billion people connect is amazing, humbling and by far the thing I am most proud of in my life.
I am committed to working every day to make Facebook better for you, and hopefully together one day we will be able to connect the rest of the world too.