[Bilderback]

Great mod but I think I'll wait awhile.
I did test briefly and noticed TABLE_PREFIX missing in the $dc_markercheck query of dcMembermap.php
Adjusting query fixed SQL error.
Awesome work.

EDIT: latest version 1.0.1
Double Edit:
One great feature would be the ability to set a default location and zoom level for the map in the settings.
In my case, I wanted the map to default to a U.S. location so I added my own longitude, latitude, and zoom level to the javascript.
For anyone wishing the same, you can edit the function initMap() in /clientscript/dcMembermap.js to add your own default overview.
google.maps.LatLng(LATITUDE, LONGITUDE), ZOOM_LEVEL
Example:

function initMap() {
    // Parse through the given points and show the map
    mapoverview = [
        new google.maps.LatLng(37.0625, -95.677068),
        4
    ];