Excellent: @diveintomark's diveintohtml5 up on github: https://github.com/diveintomark/diveintohtml5
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
Excellent: @diveintomark's diveintohtml5 up on github: https://github.com/diveintomark/diveintohtml5