The highly anticipated new model of the PSP, the PSP Go, has finally been announced! The new handheld is nearly half the weight of the PSP 3000 and, indeed, the outdated UMD design has been eliminated. PSP Go details... scheduled for release in the fall of 2009, price to be determined.
Sony's New Handheld PSP Go Officially Announced - Specifications and Features
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Features Sony Data PSP Go Specifications