Cata CE?

[Maxion]

The reason I ask is because of the pet you get from purchasing "one" SC2 CE is found on all characters on all wow accounts under the battlenet account you bind the SC2 account to.

Will one Cata CE do the same or will it like you state above be just like other expansions and require one CE expansion per wow account for the desired outcome?

I suspect that this is because a given player is less likely to buy multiple copies of starcraft than they are for wow.
Also, the fact that cataclysm is an expansion to a game, unlike starcraft which is a standalone game.
I dunno how to explain it clearly enough, but it just makes sense to me the way they've done these things.