We just did.

> What do they do on them?

I don't know, but now I want chocolate. Too bad for them, I already have a candy bar in the pantry.

>Clearly, they can replace the entire thing for the purposes of a joke so it can't be that high up there.

I bet they sell a few Kit Kat in the next few days after this little joke.

EDIT: Noticed they've coordinated a marketing campaign with http://www.android.com/kitkat/