Just noticed there's also some good information on the forums as well. check this thread here.
http://theindiestone.com/community/viewtopic.php?f=20&t=10376 Some really exciting stuff in here about updates! Sounds like the game is going to make the zombies a lot harder and less cannon fodder. I honestly think this is great news. Such exciting changes for this game. I really think they know what they are doing here and these changes they describe sound like much needed additions.
<edit> just noticed the blog post Q and A and wanted to add it in here for more info on map creation and editing. Looking forward to seeing the new world they are building.