Here's a few more ideas, I'll put them on ur wiki later....
This ones for when you guys are a lil closer to version 2.0
On your website make a BIG download free button at the top of the page, make it pick a random mirror with a script and immediately start downloading, then on the " oh great you downloaded it" page add links for help, FAQ, and other stuff you think they should see
For single player mode only make the weapon, zombie, vehicle, survivor attributes in a txt file, so if you are bored you can make the flamethrower have infinite ammo and fire 360 degrees around you
Is there gonna be split screen?
I like the green zombie who can infect you thing, please add this, it'll make your game unique
Also... I'm pretty sure I promised you I would benchmark your game... Well I didn't sorry, but now I will... I'll make a few virtual machines with what I think will be your games system requirements and make them weaker until your game cannot run properly
Broadcast locating FTW, but make it so only half the zombies hear you
Lastly, have you thought about things like zombie cows? Or zombie crows? Maybe even not zombie stampedes of animals to signal the coming of the zombie horde? Won't that be great, you suddenly find your building surrounded by stampeding cows before the zombies come