I'm starting to use this feature on larger maps and would like to do more with
it.  I'd probably sponsor these changes if it will benefit the module and
community as a whole.

1. Make a special icon of the combined points that shows the number of locations
within the combination area and a background image behind the numbers.  E.G. If
there were 50 locations within the area, the icon would be a disk or something
with the number 50 on top.

2. When someone clicks on the icon, the map would automatically zoom and the
points would all break out.  The map could encompass all points within that
combined area.