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Today's Most Important Geeks

They were never the guys who scored the game-winning touchdown or were voted class president. They were the guys who spent their Saturday nights disassembling and reassembling motherboards for fun, or who thought the perfect weekend getaway involved watching every Dario Argento movie back to back. But now they're among the most important people in the world — like Facebook CEO and co-founder Mark Zuckerberg, named on December 15, 2010, as TIME magazine's Person of the Year. He created (or stole, depending on who you talk to) Facebook "for fun" while at Harvard, and now it's the most important social-networking tool on the Internet — and is poised to become something even grander. (Christian Alminana/WireImage/
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