Facebook Statistics

General Growth

• More than 200 million active users
• More than 100 million users log on to Facebook at least once each day
• More than two-thirds of Facebook users are outside of college
• The fastest growing demographic is those 35 years old and older

User Engagement

• Average user has 120 friends on the site
• More than 3.5 billion minutes are spent on Facebook each day (worldwide)
• More than 20 million users update their statuses at least once each day
• More than 4 million users become fans of Pages each day

Applications

• More than 850 million photos uploaded to the site each month
• More than 8 million videos uploaded each month
• More than 1 billion pieces of content (web links, news stories, blog posts, notes, photos, etc.) shared each week
• More than 2.5 million events created each month
• More than 25 million active user groups exist on the site

International Growth

• More than 40 translations available on the site, with more than 50 in development
• About 70% of Facebook users are outside the United States

Platform

• More than 660,000 developers and entrepreneurs from more than 180 countries
• Every month, more than 70% of Facebook users engage with Platform applications
• More than 52,000 applications currently available in the Facebook Application Directory
• More than 5,000 applications have 10,000 or more monthly active users
• More than 8,000 websites have implemented Facebook Connect since its general availability in December 2008

Mobile

• There are more than 30 million active users currently accessing Facebook through their mobile devices.
• People that use Facebook on their mobile devices are almost 50% more active on Facebook than non-mobile users.
• There are more than 150 mobile operators in 50 countries working to deploy and promote Facebook mobile products

You can find those information at http://www.facebook.com/press/info.php?statistics