World Go Clubs Map
Intended to be a map of all the go clubs in the world, but it also has layers for individual Go players, national Go associations, and internet Go servers.
Interactive Google map - https://mapsengine.google.com/map/edit?mid=zUFqP7eRibjg.k9aPlMDK_TPM
This database of go clubs is free for you to edit: http://goclubdb.herokuapp.com/
It feeds into this map: http://umap.openstreetmap.fr/en/map/go-clubs_76310