If you're going to publicly file an IP address example, why use one that geolocates to northern China? Examples:pic.twitter.com/hFNimXnWmD
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
Yeah. Haven't scoured dates to find earliest-source yet though.
No idea. Interesting though.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.