I fount on slideshare a very interesting presentation from Lindsay Roddy called “Social Media, Happiness, Petabytes and LOLs” which gives tons of interesting information about Facebook.

- 200 Millon Active Users.

- More than 20 million users update their statuses at least once a day.

- More than 850 million photos uploaded to the site each month.

- More than 8 million videos uploaded to the site each month.

- More than 1 billon pieces of content (web links, new histories, blog posts, notes, fotos) shared each week.

- More than 2.5 million events created each month.

- More than 25 million active user group exists on the site.

We recommend you to take a look at the presentation

Text Analytics Summit 2009 – Roddy Lindsay – “Social Media, Happiness, Petabytes and LOLs”