Full screen maps are now included on the business details page in Berry411, replacing the small Mapquest thumbnails that were there before. These mobile-friendly maps come courtesy of the Yahoo Maps Image API, which allow you to construct a map image of arbitrary dimensions for any address or latitude/longitude, and the ym4r Ruby gem that wraps the Yahoo web service. Google currently doesn’t have anything like it, and the Yahoo service is free for up to 50,000 web service hits a day.