There's a web status addon that used to be on RunUO, but it was in a very old archive, so I don't know if you'll have much luck finding it. It uses whatever map files you set and places dots on the map where players are at in the world.
There is this package as well, but I have no idea if anyone updated this resource for ServUO's current emu. http://www.runuo.com/community/thre...-system-display-players-houses-on-map.103420/