Added several castles and towns for a new faction, but haven't done two things: created the entries in python yet, or managed to get my alterations to the world map to show up. I have a feeling it's a noobish mistake, but nothing shows, even when the map editor loads the altered file.
Vaegirs and Swadians have three new castles each, there is a new tribal faction with six small towns, and I'll be working on the Khergits tomorrow. Plus the shiny water, and I think I'm on a winner here. Now I just need to beg Yoshi to tell me how to get those gorgeous beaches.