Zombie Apocalypse Serialized Novels

I actually haven't read too many books about a zombie apocalypse. I guess '48 might qualify, but I can't remember too many others.

I just came across a trilogy of zombie books by Dave Wellington. They were originally published in serialized installments, and can still be read for free on his site, but the full printed novels are supposed to come out around April of '06. They're supposed to be pretty good, so I'll have to check them out.