When Kenneth and Andy play chess, Kenneth is using the Alamo chess set. This is rather symbolic, because basically it's the same situation - a handful of survivors outnumbered by the enemy's forces.
The sheriff in the movie was Tom Savini who did the makeup and special effects in the 1978 version and also had a cameo as a biker in the '78 version.
The bloated woman who is brought into the mall in the truck is actually played by a man. His name is Ermes Blarasin, and he is a stuntman.
During the movie there are parts especially outside where an orangy tint comes over the screen. This is an homage to the 1978 version of Dawn of the Dead, which was shot in this type of hue.
The mall the survivors are in is called the Crossroads mall. This seems fitting since humanity is at a crossroads in the film flirting between survival and extinction.