[neverending]

There's a low budget zombie film that came out a few years ago that I'm quite fond of, but I can never remember the name. I got tired of searching for it, so I'll just list some resources for you, and you can quickly dissuade yourself you've seen even a majority of zombie movies.

Zombie Movie Database
http://www.trashvideo.org/zmdb/index.php

List of zombie movies on wikipedia
http://en.wikipedia.org/wiki/Zombie_movies

And if you search for zombie on imdb, you'll get over 1400 results.

Here's a fairly common zombie film I bet you've never seen. It's Victor Halperin's OTHER zombie movie:
http://en.wikipedia.org/wiki/Revolt_of_the_Zombies