I'm intrigued, especially since post-apocolytic and survival horror stuff is in my current wants, and zombies are a cool way to do both (though, I must admit, I've yet to read the book World War Z).
I'm wondering how you intend to do this, Linna, is it going to be freeform shared world style writing exercise, or a GM and players tabletop style arrangement?
Also, are our PCs part of the military or a civilian cargo plane? It'll make a difference in both expected training and available gear, naturally.
Depending on how this works out, I'd like to tentatively put my name in as the female co-pilot or perhaps flight engineer. Those are the two roles that sound most appealing to me.