I dont even know if MS has enough money to buy Nintendo. Sure Bill COULD sell all his stock in MS (which is where almost all his money is) but then he would trade being largest shareholder in MS to largest shareholder in Nintendo. Frankly, I'd rather own MS than Nintendo simply because MS is a monopoly and Nintendo is fighting for its chunk of the market. Anyway, any price Yamauchi would offer MS would be HUGE, and I think that MS stockholders would Kill Bill hehe. A buyout of SEGA was more plausible until they got bought by Sammy, now thats rather unlikely as well.
Meh, all of this is moot, Yamauchi will NEVER sell (or die, he is invincible you know) and so therefore M$/Bill can't buy.
-Blue