Howto Enable the Google Map
To enable this feature, go to the Members section of your site and click Admin, then check the "Enable Google Maps" checkbox.
Howto be listed on the Map
To be listed on the map set your Country, City and State in your profile (My Account -> Profile). And if you do not want to be listed, simply leave these fields blank.
So if you're interested in a nice overview of your member's locations, enable the new Google Maps feature on your site! =)