There's actually very few things in BattleMaster that would take less effort to set up a way for volunteers to help with than it would to just do ourselves.
Drawing sea zones probably aren't in that list, because we would want to be the ones deciding how they are laid out, and once we do that, communicate it to the volunteers, and create the script for drawing them...we might as well have drawn them ourselves.
The one thing I can think of offhand that does fall into that category is the re-creation of the maps in the original Age of Wonders editor. This would make it easier to make changes to continents (though still by no means easy) if we wanted to do so. Additionally, as many already know, the original full-size geographic map of Dwilight (the one without the region borders and names) was lost, and the one in use today is from an earlier revision of the continent. If we had a copy of the map made in the Age of Wonders editor, we'd be able to replace the obviously-wrong existing geographic map with a correct version, which would make the dynamic map look so much nicer.
I don't think there's really anything we would need to do to enable that effort, besides provide a place to coordinate it. I would recommend using a shared Dropbox folder or something similar to keep the map file in, so that multiple people can work on it (provided they don't try to do it simultaneously). Based on my experience re-creating the South Island map, I would also recommend comparing frequently with the existing map, as things can get skewed pretty fast...
