Diomedes, maybe where you live there are plenty of Wii's in stock, but I haven't seen even 1 on a shelf here in Holland. So the situation in Europe could be different from country to country and there's no way to know for sure whether demand in the whole of Europe is smaller or bigger than in Japan or the US.
haha I live in holland 2, dont know where u have been but in most store there are still a couple standing.
I live near The Hague. Anyway, it's not like I've been looking for one and been checking stores constantly, but whenever I checked a store to see if they had any in stock they were sold out.