In the new episodes it turns out that kenny can't die because of some kind of super power. But there is an episode, the one with the golden psp, heaven vs. hell, where he dies and even goes to heaven?

There's actually one thing i don't understand about Kenny dying: Kyle, Stan, Token,... Never remember Kenny dying, but in the episode 'Cartmanland' some people come to take cartman's money, and they say he still owes money to Kenny's family because he died, and then Cartman says 'Kenny? But he dies all the time!!' I'm not sure it's a blooper...

I guess God just needed a kick-ass PSP gamer in Heaven, uhm... yeah.
Besides, he was back the next week.

Notice the question of the other boys not remembering Kenny dying didn't come up until after Cartman was kicked out of Coon and Friends?

Maybe Cartman always remembers Kenny's deaths but just doesn't care XP

I think Kenny's soul just does whatever it wants... if he wanted to float around for a while he could, when he wants to go see his friends he just comes back.

I don't think that is very important, maybe it's just because Cartman doesn't realy thinks as Kenny as a friend, but more as... A tool?

I just watched the episode where he reveals he can't die just to be sure! In that episode he says he ends up in Heaven, Hell or just ends up in Nowhere, THEN he gets reborn and wakes up in his room wearing his ordinary clothes!

There must be some thing to the fact that Cartman does realize that Kenny dies all the time. Seems to make scence (though I doubt it was actually intended to be that way)