I had the idea of starting a list of go players, but then I found your map. It has a good number of clubs, but overall the map doesn't show many players yet. I'll help get word out about the map if that's okay. I want a way to find players in my area, since I'm not very close to any clubs, and this map seems to be the most reasonable choice. If we can get enough people to add themselves, this map may become very useful for players looking to set up face-to-face games in areas without clubs or tournaments.
I'll put a reference on my info page to help lead people here.