I LOL-ed.

 um.. maybe you should look at it in terms of the company, sure.. take2 has made a lot of copies of gta4, and that is a lot more than nintendo has made of mario kart wii.. but look at the bigger picture.. this is a table of publisher totals from the week of gta4 release onwards

 sure this doesn't indicate how many were printed on these weeks from the respective companies.. but maybe this could illustrate for you that nintendo has to be concerned with more than one game, let alone peripheral and console hardwares

Yep, I'm in US and tried to buy it at both Target and Best Buy, but the game was sold out. I'll probably get PSP game tales of Eternia and try mario kart again in a month.MK Wii got kinda low review scores tho so I'm not really that mad that I have to wait.

 Ignore the scores: it's a fun game.

On topic: I do think it's absurd that Nintendo is failing to keep up with demand on a game that they should have known would do quite well for itself. I understand there are production difficulties, since factory production is finite and Wii software is selling at a record pace, but Nintendo's been caught off-guard by the Wii's popularity a few too many times for my comfort. I do wish they ramp up production sooner rather than later.

I've seen Yesterday mario kart wii in Paris. That's the first time since two weeks ago... Same for Wii fit, I was about to buy one.

Plenty of the around me. Must be a big city problem.