I don't seem to be able to drag icons from the library onto the map
yet though...not implemented yet?
Actually, it is (should be) now, but it's Having Issues with adding new
icons to your current display. The workaround is that that addition
forces a reload, though that won't help anybody else who's watching the
same map (moral: reload once in awhile just because).
They also still go to the upper left of the screen instead of where you
drop them, because they're not properly detecting the X/Y coordinates
in the onDrop.
