My Maps With Comments
My Maps now allow users to leave comments. In conjunction with the new collaboration option this feature really moves Google Maps into the social networking area.
The LatLong blog gives the example of this collaborative My Map of European Travel Tips. Anyone can add their tips to this site and now with the comments option they can comment on the tips of others and can even discuss the organisation of the map.
Via:Google LatLong: Comments, ratings and top links for My Maps