Research Triangle Park, N.C. - Sony Ericsson on Wednesday released its W580i Walkman phone in the U.S., which will be sold at AT&T stores as well as from Best Buy, RadioShack and Amazon.com. The slider-style phone includes the Walkman 2.0 media player, up to 4GB of memory, a 2-megapixel camera and features such as music ID software and Shake Control, which lets users skip through songs by flicking their wrists.

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