The Sony PSP Go is today being reported to have "completed" its production and shipment in Japan, seemingly foreshadowing a worldwide discontinuation of sales. Such is the word from Impress Watch, which cites an official statement from Sony Computer Entertainment that promises support, firmware updates, and repairs for the PSP Go, but no further stock of the handheld. We doubt it'll be missed too much, what with its high price and inability to play UMD games, but if you're afraid this signals a similar demise for the PSP-3000, worry not. Sony has said it'll focus on s