THE RAPID RISE OF SOCIAL BLOGGING In four short years, Tumblr has grown from relative obscurity to start-up darling to international microblogging network. The platform has grown a staggering 900% in the past year and eclipsed platform competitor WordPress, largely due to its global reach and brand-building potential.
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What makes a good Infographic? via @mashable
Facebook by the numbers - October 2011