The Cooltown post on crowdsourcing the places you want was great- i just wanted to add Google now lets anyone edit/add features like businesses, parks, schools. 

Not every country, but places such as Vietnam and Iceland.  Being that I want to visit those places and would probably use Google Maps it’s cool “people in the know” will be able to provide pertinent info.

http://www.readwriteweb.com/archives/google_map_maker.php

- luke