The Esri Nearby Android Sample Code by Esri presents how API interaction allows to find places nearby and route to the nearest location. Features include geocoding with categories, device location, and calculating distance.
Google continues to expand its third version of the maps API to include features already in the second version. Most recently, they've added driving directions, which gives programmatic access to the routing data between two points. As with the rest of Maps V3, which was released in May, the team took a fresh approach, so some interfaces have changed.
Foursquare has launched Places API for Start-Ups which provides access to Foursquare location intelligence capabilities at a price point between the free tier account and the Enterprise tier account. The Places API allows companies to integrate apps with Foursquare platform data and capabilities.