I understand the compulsion to work a project like this on a different forum but I wonder at the wisdom of this. If this is going to be one of the few, if not the only, areas of development in MWLL going forward then don't we want forum grazers to see that the mod is still being actively developed in order to maintain a baseline level of interest? The best thing we as mappers can do second to producing quality maps is to be entirely overt and obvious with the effort being made in this area. The obvious downsides are that non-mappers would be free to chime in and be disruptive to the process and that we would have limited control over the forums but at least we would have an audience when/if these maps get finished.
On a different subject, it would be nice too if folks who have lead on map design before could set up a work flow for us. I've never done anything like this on a group level but understand that maps are comprised of many different parts and will require some division and then merging of labor. Skycard, Minimap, Sound, Loading screen, terrain, color map, height map, solids, color palette, particles, base placement/design, flowgraphs, temperature adjustments, capture zone, combat flow, choke points, etc. All of this needs to be organized.