I already did some groundwork for a Westeros map in this thread:
http://forum.shrapnelgames.com/showthread.php?t=39527
What I'll need are people that own the board game version of it to use those province borders, which seem fairly good to use as Dom3 map borders, too, and/or people who can draw pretty province borders, preferably as some vectorized paths with some path effect applied to it then. I haven't dabbled with that kind of computer graphics work yet.