My copy arrived today from Play-Asia. Only had about an hour with it so far, but I had to post.
First of all, graphics = pretty crappy... but who fucking cares! This game is serious fun! Crazy Taxi with zombies, indeed. I don't read or speak a lick of Japanese (other than reading English words written in Japanese, of course) so I didn't catch much of the story, but really who needs one? Zombies walk the earth and you, as a punk ambulance driver, must get the remaining humans of the populace to the safety of the hospital.
The controls are simple. The X button controls the gas, O is brake/reverse. Triangle is your nitro boost. You basically roam the city running over crowds of zombies until you spot a white dot on your radar (which doesn't see very far, but can be upgraded later apparently). Going to the white dot reveals a normal human, usually crouching in fear, within a glowing circle (again, Crazy Taxi). Stop within the circle and they'll hop in.
You must get them to the hospital before their health runs out. One thing I'm confused on is, why is there a giant picture of a building in the top left hand corner of the screen? Can seem to find it's purpose.
As you run over zombies, occassionally an enterprising undead will attach itself to your ambulance, either by hanging on the side or riding up on top. The borders of your screen show zombie hands in conjuction to where the zombie is on your vechicle. To get them off, you jiggle the control stick back and forth, thus knocking the zombie off. The longer they hang on, the more damage they do to your ambulance.
As noted in the NCSX translated info, as you save people, they'll help you upgrade your ambulance. This is where I really wish I could read Japanese. I have no idea what the upgrades I'm buying are, but I guess it really doesn't matter that much. Hopefully some enterprising individual will give us a translation.
Anyhoo, Zombie vs. the Ambulance is great, and for $20-something you just can't go wrong. It isn't as great as EDF2, but really, what is? For those that enjoy running over zombies (who doesn't?), this is the game for you.
Nate
It's already been said that there's like three games out of the entire line that are worth checking out. The Daibijin game was amusing at first, but it's crap too. 
