I was stumbling around the interwebs and i came accross the site for a new video game company called
Undead Labs. they are working on an open world zombie apocalypse game code named "Class3". it's still pretty early in development, but it looks ambitious. they are already talking about using the feedback from Class3 to create an MMO version code named Class4.
it looks like it could be pretty good, and i'm really looking forward to the MMO version.
Edit: i guess it's called State of Decay now.