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Information overload is so five years ago, but the problem it describes is all too real. Fortunately, there's hope yet for the savvy librarian: Twitter and FriendFeed turn information dissemination on its head, using friends and subscribers as a filter for the best, most credible, and most engaging information out there. As Clay Shirky said at the Web 2.0 Expo keynote in January, the problem isn't "information overload. It's filter failure."