I bought it straight away. $13.50AU ish for five new maps, one of which, Ascension, is a zombie one? Hell yeah.
Sorry to not join the anti-Black Ops bandwagon in these parts, but I have spent more time playing the zombies online than I have most other games all up. There's also a full single player campaign and multiplayer bot mode for me to get stuck into aswell, if I ever get bored of shooting the zombies, that is.
This is one of those (albeit quite rare) times where I feel the criticism being flung about here isn't entirely justified.