Some more of my personal favourites with a PA feel:
Post Nuke Comic (
http://www.blastwave-comic.com/index.php?p=comic&nro=1 );
The Zombie Hunters (
http://www.thezombiehunters.com/index.php?strip_id=1 ) which has a cool paramilitary organisation called the Red Halos which I think could be ripped off quite nicely for a campaign;
and
Everyday Decay (
http://www.everydaydecay.com//archiv....php?comicID=1 ) which starts off with artwork which I think is kind of "meh" but greatly improves as it gets further along.