Here are the non-trilling answers Frapper sent me:

1) How can I add Places of interest to my map?

At this time each person can only add one pin to any map. It is possible that in the future we will add the ability to add multiple pins again.

2) How can I change the caption underneath my photo?

This is not possible. You must delete and reload the photo.

3) Is it possible to not have the map start off by scrolling through the members?

No, we have not offered this option yet. The pin playback stops as soon as anyone clicks anywhere on the map, so hopefully they will understand that and stop it when they want a static view!