Dima. Maybe You dont know, but my suggestion is it the most viewed & has 31k viewers!
I wrote you, that this is maybe most important things in zh google component.
Look there, where is another component developed by styleware.eu and it is commercial(!) - styleware.eu/store/item/7-styleware-k2-maps It's working as plugin with K2 article and for each registered user can add self own placemark in self-service mode and this is a best way to build extended website for more users.
Thanks. On this week I will finish my code refactoring for my other extension (Yandex Maps), and I'll return to do changes in Zh GoogleMaps - to rewrite placemark inserting from frontend and so on.