I'll put up the overview map this weekend sometime... though clearly the quality will drop due to the size. Total map size is about 6000 miles north/south by 2500 miles east/west.
By the way, I did the forests differently, using a bitmap fill from DD3 (dirt and grass) and then doing a lighter green glow on a 30 mile radius, as well as a blur on the forest bitmap. Gives it a sense of depth along the edges, as well as a nice transition. I played with about 50 sheet effect combo's before settling on this one.