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Arianna Huffington and Tina Brown are locked in a bitter battle to line up high-profile contributors for their respective websites/blog networks, but it looks like Arianna will emerge as this week's winner: She's convinced cranky billionaire Carl Icahn to not only blog on his own site, but also post the same pieces on the Huffington Post. Now you can not read Icahn's boring missives on two sites instead of one!