A Crash Course in Modern Hardware http://developers.sun.com/learning/javaoneonline/sessions/2009/pdf/TS-5496.pdf (InfoQ has video)
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
A Crash Course in Modern Hardware http://developers.sun.com/learning/javaoneonline/sessions/2009/pdf/TS-5496.pdf (InfoQ has video)