Best Industries 2012: Internet Publishing | 5 Powerhouse Start-ups to Watch

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In the last year, Tumblr has been the platform of choice for a number of key events, including the Occupy Wall Street movement and the launch of President Obama’s official 2012 reelection campaign. And those are just two of Tumblr's nearly 54 million blogs. The average Tumblr user creates 14 posts each month bringing the total post count to more than 22 billion. To date, the company has raised $125 million in funding.