Actually the Marvel Zombies comic was spawned from the zombie story line in UFF. Zombie FF are the only zombies in the ultimate universe. Read the Zombie series to see what happens to the rest of them.
Wait... bugger... I just realised something. Read the zombie series and then speak to me again about this. bugger...
I was just asking cuz I dont like to go tracking down old comics and ending up with only bits and pieces of the story. Bit of a comic noob and I now I have to go tracking down the rest of the Spookshow international comics(huge fan, thats the series that got me into comics - which since is becoming the main part of my art/drawing), it'll cost bout $80 for me to get the 5 i dont have...I didnt want to have to repeat a similar thing with UFF/zombie.
I am more of a collection book/mini series/one off buyer for this reason. Like I said I am a bit of a noob and am still working out what comics are for me and what is out there. Dark horse and anything with zombies are normally my bag. But the last few weeks I have decided to get clued up on the comics I dont know much about and have been borrowing alot of the marvel/DC collections EDIT: from the library.
Being fairly new to comics about all I can recommend are these two:
Marvel 1602 - OUTSTANDING! Marvel in the year 1602. brilliant art and setting. The way the story is integrated into the marvel universe and real world history is really cool.
Rob Zombie Spookshow international - I just got these being a house of 1000 corpses fan and I knew they had back story on the firefly family. These have many different stories/series running simoultaneosly in each issue;lots of gore, zombies, booty and I find them to be funny(though selfish disagreed). They kind of make fun of the way comics are written at times. Just about everything about them is up my alley.
The Marvel mangaverse comics look awesome too, they are very fast paced. I have only read a bit of Xmen:ronin mangaverse, but I need to know more about Xmen:ronin before I can judge/recomend them properly.