I still don't get why Notch wants to start a company. The way I see it, he's taking money he could live off for the rest of his life and throwing it at something with, at best, a 50/50 chance of success. He's just bringing a whole lot more stress down on his head with the whole thing and all it's gonna do is drag him away from what I assume his real passion is; making games.
If I were him, I'd probably just work on indie games by myself for the rest of my life without having to worry about bosses, employees or anything.
But hey, if we get more great games out of it, who'm I to judge?