What other games can I play with the zombies from Zombies?
What can't you do with a giant pile of zombies?  If you do the table-top RPG thing regularly, the zombies make great generic bad guys.  Some friends of mine created a variant of Frag called Frag Zombies that used plenty of the zombie figures during the game.  Pretty much any board game that uses miniatures is a potential use case for the zombies.  Imagine playing a zombie in Monopoly.  You could build a Zombie army in Risk.  How about using the glow-in-the-dark zombies in a game of Last Night on Earth?  The possibilities are endless.