Pretty sure I'll be calling them zombies even if they don't like brains and aren't rotting. I always refer to 28 Days Later as a zombie film, even if "technically" it isn't one.
i think that this game is based on Dawn of the Dead. Actually, zombies from 28 days later are not zombies. They are people infected with rabbies. They are just mad sick people.
I vote Zombies. Whatever their real name may be. I call the TF2 soldier a "Rocketeer" because I played SourceForts before TF2. I think the same applys here. And if you say zombies, EVERYONE will know what you mean.