If you're a regular Atlas user, you may have noticed links to "Add Wikipedia Content" in the results of certain location searches. That was our first version of Wikipedia integration with Atlas (using the Futef API).
This week we improved the integration. Instead of offering Wikipedia results to certain searches, we now have a Wikipedia search tab front-and-center on the Atlas homepage.
This means you can add any geocoded Wikipedia content to your map. Run a search, click "Map This Result", and you're done. As with local search, your search is restricted to the area you have displayed on the map -- zooming out broadens the search, zooming in narrows it.