I just released a rather large update to the Cemetery Maps application.
One of the most notable improvements is faster map loading times through the use of clustering. Initial tests show that map speed has increased 75%.
Additionally:
Hi Gwyneth,
The Cemetery data is updated periodically during the week based on information provided in the CategoryInfoBox Cemetery template.
So for a cemetery to be included on the map, it must have the CategoryInfoBox Cemetery template present, and the coordinate parameter must be filled out.
As an example, see this category page that is fully filled out and included on the map: Sterling-White Cemetery.