It only seems logical there would be a collaborative effort to add a folksonomy component to world mapping - enter Tagzania. Whereas 43places is more travel-oriented, focused on photos and user experience and stories of places, Tagzania makes use of the Google maps API to actually add tags to the maps themselves - so you can set a waypoint and tag it up. Each waypoint then becomes a "page" with an RSS feed, to track what other users add over time. All content submitted becomes open content under a Creative Commons ShareAlike license.

[Via Smartmobs]