I'm arranging a map in the Sadhu! Theravada Web Directory http://dhamma.ru/sadhu/
Recently the engine of the directory broke, so I changed the engine to one with a map, and restore manually all the entries from the preserved data file.
So far the USA Theravada organizations are not entered, - it requires time to put in the data and fetch the coordinates.
If anyone would like to take part in this work, you are most welcome.
USA map with a few organizations is already visible in the corresponding category.