Thanks to a recent major issue, the files for the mod have-! If I said what has happened I wouldn't be liked. In other completely unrelated news to the file issue, the first level is being re-developed!
Yes ZC is still alive.
I noticed somebody posted back in June that another mod is going by the name of Zombie Co-Op... Wow, did those fellows do any research before naming it? Has anyone told them a mod already exists by that name? Weirdos.