Facebook Will Allow Users to Share Location: http://bits.blogs.nytimes.com/2010/03/09/facebook-will-allow-users-to-share-location/
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
Facebook Will Allow Users to Share Location: http://bits.blogs.nytimes.com/2010/03/09/facebook-will-allow-users-to-share-location/