The Geocodio Reverse Geocoding Node.js Sample Code demonstrates how to convert latitude and longitude into a street address with API access. Geocodio will find matching streets and determine the correct house number based on the location.
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.