During the week of May 12th to May 18th, the PSP system outsold the Nintendo Wii by almost 30,000 units and even has double the units sold of the Nintendo DS.  With a much better game library in Japan, it's easy to see why it's doing so well.  The real question is, can Sony bring that same enthusiasm to the PSP overseas to Europe and the U.S.?  Only time and a better library will tell. 

Credits to Kotaku.