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POPSTinyURL.com Very handy for sharing links for http://twitter.com. For example, Engadget posted the following update: "QRIO befriended by toddlers in study, http://tinyurl.com/2y3gob." Much better than posting "QRIO befriended by toddlers in study, http://www.engadget.com/2007/11/07/qrio-befriended-by-toddlers-in-study/", especially when restricted to 140 characters.