This has been one of the greatest community achievements that man has made in the last 20 years. Here's hoping it stays open, and empowers people and small businesses alike.
As games are mentioned here -- we do have a number of "community acheivements" in the sector as well. The DooM, Build or Quake games are an example... being over 20 years old and still going strong!
I remember going to an event in 2006 called "Mapchester" in Manchester, UK to gather data for OSM with GPS units and digital cameras. It's come an incredibly long way since then!