I just came across this great post on social media numbers titled - 20+ mind-blowing social media stats
Here's a taster...
Facebook claims that 50% of active users log into the site each day. This would mean at least 175m users every 24 hours… A considerable increase from the previous 120m. Twitter now has 75m user accounts, but only around 15m are active users on a regular basis. It’s still a fair increase from the estimated 6-10m global users from a few months ago.There are more than 3.5bn pieces of content (web links, news stories, blog posts, etc.) shared each week on Facebook.About 70% of Facebook users are outside the USA.15% of bloggers spend 10 or more hours each week blogging, according to Technorati's new State of the Blogosphere.70% of bloggers are organically talking about brands on their blog.