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"The plug-in GPS Receiver for PSP was released today in Japan and inevitably, has been made available to potential importers via Play-Asia ($68.70, includes shipping to US). Its usefulness is currently limited, as the navigation software (of Japan's roadways) has yet to be released; though Sega's constellation navigator is available.In addition, the device is compatible with Metal Gear Solid: Potable Ops, but limited GPS usage in the game doesn't exactly warrant the $70 splurge. The receiver will also be compatible with the next installment of Hot Shots Golf, which is due out early next year in Japan (as Minna no Golf-jou)."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.engadget.com/2006/12/07/japan-gets-psp-gps-others-can-import/>