I'll be posting a more detailed reply later on in the contest, but here's what we're doing so far.
Each group will be getting an entry number from an xMAPCOM member 1-2 weeks before the end of the contest. They'll have to include that entry number in their map's worldspawn message. We're talking about if we should send entry numbers on request, just in case some mappers are finished early and want to get it over with. There are some problems with that idea though.
Each entry will have to be sent, emailed, anything, to any xMAPCOM member in the format of a zip, including all the necessary contents. From there, the playable map (.bsp) file will be sent to the judges for rating.