I agree about World War Z, it will be interesting to see how it plays, ( I'm worried it might be cheesy too ) I'd also like to see how humanity turns the tide; the tactics used in the book wouldn't work against the hurricane-o-zombies that we have seen in the previews so far.
Agreed. Fast moving Zombies are the only ones that could plausibly overtake our military. The one's seen in Walking Dead simply after they discovered how to easily kill them would be history.
But yes, the hurricane zombies we saw in the tailer wasn't encouraging to make Z plausible either.
28 Weeks Later probably thus far has done the fast zombies the best - but IIRC they weren't even zombies just very sick live humans.