I bumped into this list recently, and figured it would be a great idea to make a big world map using those cities and their countries of origin.
http://www.mongabay.com/cities_urban_01.htm
In total the list contains 3158 cities which would make the map as big as "Big US".
I would definitely be interested in teaming up with a few other Warlight players to start the project, because, unfortunately I have neither the time nor Inkscape talent to do it myself.