Rap enthusiasm site, Rap Genius has gone through the impressive tasks of combing rap and Google Maps. Rap Genius' Rap Map is a Google Map-based visual almanac of all things rap. You can scan an area and view rap landmarks and places mentioned or referenced in some famous rap lyrics.
BlindSquare founder, Ilkka Pirttimaa, once browsed over Wikipedia's Augmented Reality article and realized the concept focused solely on vision. Pirttimma believed the concept could expand to audio; thus, the idea for BlindSquare was born. The BlindSquare app provides "a new solution that combines the latest technology to help the daily life of the blind." BlindSquare pulls data from the FourSquare API and alerts users of restaurants, stores, and other locations surrounding them via audio instructions.
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.