PSP gets price cut, GPS, camera, VoIP and future media download service | Engadget
Official Sony PSP GPS Receiver w/case *Playstation Portable* PS PSP-290 | eBay
Google Maps User Finds A Giant Sony PSP In New York City
Sony PlayStation Portable PSP-290 GPS Receiver In Box Untested AS IS | eBay
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TGS 06: Sony debuts PSP GPS - GameSpot
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Sony 9926658 Go Explore (includes PSP GPS Receiver) for sale online | eBay