The Zombie Apocalypse is my obsession right now, so I apologize to you and the rest of the MOOC in advance. :)
The Zombie Apocalypse could always use people who know how to make shiny things that POP! As I understand Illustrator and Photoshop, that's what they're best at. I'm not sure where the ZA group will go as we grow and build, but I can see your students possibly coming into the game in the role of PR and Information, collaborating by creating various media to help present the information that other members of their team will provide.
The Zombie Apocalypse is Coming....Are You Ready? -DoZI