Wikimapia is a web service that allows users to edit information on a world map in a wiki format. Users of the site can add places, edit them, and get the information previous users have entered. The info there is currently pretty sparse, but the service is rather new. The company also recently released a Wikimapia API that supports getting information from the web service.
MapQuest has officially released the first production version of the iOS Maps API. The announcement posted on the MapQuest blog on July 19, 2012, states that "Today marks the first production release of the MapQuest iOS Maps API, which allows developers to build iPhone and iPad apps that incorporate the flexible routing, accurate geocoding, and unlimited free base maps that MapQuest is known for."