Nah. I think zombies are fascinating and frightening to people on various levels, but in terms of why geeks in particular love them, I think you've missed the biggest point: zombies represent everything we hate about modern society, because they're average joes. They represent soulessness, conformity, and a loss of individuality. There's a reason so many zombie movies take place in malls ? all of it is associated with superficiality, capitalism, and the mindless pursuit of stuff. We love zombie apocalypse because in the breakdown of society, being a loner is the only thing that will keep you alive, and we feel good about that.
Basically zombies are everything we're afraid of becoming, because we all want to be special. Particularly geeks and artsies.