Taken to the level this one used to be:
The functionality is, your users (and/or usergroup) could plot various points on a map and provide categories (fishing spot, marnia, fuel, etc...) as well as comments. These points would be plotted on the map with an index below.
An example is this:
But I either need to open the map wide open, invite google users, or edit it only myself. I would like forum members to make edits...