IMO you should only need to buy 1 client and it should be playable on all of them from there. You didnt see Blizzard charging extra to play on Mac. /shrug ... good news regardless, although I will not be buying PS3 version until the price drop a bit more.

Hope they dont try to pull this crap with expansions as well. Actually, I think ill hold off on getting the console version until they confirm they wont be double charging expansions too.