There is a 'free' vmware-player available. It can run prebuilt vms, but cannot change their options. Youll either need vmware-workstation or other third-party tools which can construct a vmx-file which describes the hardware of a vm - and a tool to create a virtual disk image - for example quemu.
So, I think the question here is, would it make sense to create a virtual disk image that runs a Nexuiz-server out of the box, for either quemu, vmware or some other vm.
I personally prefer to run my servers on real hardware - since my machines dont have any virtualization hardware built in
I would say a goold HOWTO, FAQ, ... and a good example config with lots of comments would make more sense here and would enable the "not so technical" guys to also run a nicely configured Nex' server.