What is this?pic.twitter.com/t0KRJXH8tb
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
Can't find anything showing it "in action", but it would sit underneath the green part in the middle of the board.pic.twitter.com/uwMQGHajmc
You can see it pictured in the instruction manual here (courtesy of an ebay listing)pic.twitter.com/mmvJE8I8co
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.