There has been a lot of buzz around Tumblr recently, mostly thanks to Yahoo!'s $1.1 billion acquisition of the company a few weeks ago. There's almost no doubt that the microblogging network's price tag was worth it. There's no avoiding the obvious: Tumblr's huge, and it's only going to get bigger. But, what's happened behind the scenes; how did Tumblr and its founder, David Karp, get to this point? Here are 30 things you didn't know about your favorite microblogging service. Now tumble that.

And for more on the Tumblr CEO, read our online cover story here, David Karp: Leader of the New School.

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