OK, so everyone wants a video and stuff to comment on. Here you go then :wink:
http://www.youtube.com/watch?v=otoB0-nKJBk
I'm sorry about the quality and the occasional lag, the recording program I used is awful (its the video not the game, honest :P). Also, I ended up having to record the audio and the video seperatly, but I won't go into that. Anyway, this video shows that the game does allow a hell of a lot of zombies on screen (I think 34 is the most you ever see in the video, so didn't quite reach the 40 this time, but you get the idea) and the animations of the new guns and redone ones of old guns, as well as new graphics and multiple zombies (in the first part at least). Please comment now :P.