I am also from the guild. The map is one of many tiles in our Community World Building Project area the CWBP. Theres a world and a region within that world which was divided up into tiles and we each mapped a tile. Theres many cities on many of the tiles that have been mapped also. Most of the tiles have been done and theres an infinite amount of sub regions and more cities, caves, dungeons etc to map if anyone feels like adding to it in a creative commons way. Anyway, just for a teaser here is an image of the tile set in the region called Ansium. Sigurds map is bottom right. If you need a free and expanding campaign world with a wiki and a lot of stuff made for you then you could do worse then look over it.
