The lives and deaths of mobile platforms http://www.asymco.com/2011/02/19/the-lives-and-deaths-of-mobile-platforms/
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
The lives and deaths of mobile platforms http://www.asymco.com/2011/02/19/the-lives-and-deaths-of-mobile-platforms/