this ist still under development.
the idea is to provide a map with different layers(e.g. earth population, atomic power plants, wheat growing acreages, sunrise or what you want)
and markers(events, demos, friends, anything, that is intersting for you).
These layer and markers should be importable and deletable by the user.
help on this feature is very appreciated. i am not that good in js so it's a start, but needs tweaks and further dev.
just contact me, if you are intesrested in joining
http://localhost/friendica/profile/thomas
this is build with mapquery http://mapquery.org/ and
openlayershttp://openlayers.org/