Google has just announced 'Google Buzz' a social networking tool similar in some ways to Twitter but with location brought to the forefront. You can quickly add your location to your 'buzz' and its viewable on a map. Of note is the 'buzz layer' in the new Google Maps app that allows you to see whats going on in a location via the local information provided by the users using buzz - the InfoCrowd:
Interesting and big enough to cause an upset in the current social networking scene, also powerful enough to change the way we view information about the city.
Visit buzz.google.com from your phone's mobile browser to start using buzz.