Sony is proud to say that their PSPgo sold about 28,000 units in Japan in just one day. This may be good enough but the previous PSP-3000 sold more than 140,000 units last October within four days so that means 40,000 sold per day.

Nintendo DSi, on the other hand, sold about 170,000 in just two days or 85,000 per day. So is the 28,000 big enough? Not really…

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