How Twitter Was Born - a short history http://www.140characters.com/2009/01/30/how-twitter-was-born/
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
How Twitter Was Born - a short history http://www.140characters.com/2009/01/30/how-twitter-was-born/