I got an email today saying the gruntz rules had been updated and that those who had purchased the pdf before could download the new version.
And I must say, this new book addresses pretty much all the small things that bothered me about this system. If the basics of the system scared you of things wont have changed enough but if the rules seemed just a little to rough before you might want to give it another look over.
Perhaps my favoured new option is the addition of the rules for b-movie style monsters. I think I might need to start building a gzg crustie army and give them a giant enemy crab!