Oh, I see, you mean the default address that is displayed if the address lookup failes.
in the map javascript file, you will see a line similar to:
if (wagmp_map_2_obj.addressFailed) {
map.setCenter(new GLatLng(30, -98), 3);
}
you can change the latitude and longitude in the GLatLng function to change where the map will center if the address lookup fails.
GLatLng(30, -98)