From PA poll. Oosh.pic.twitter.com/ek4hyJ2mgW
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
Bad news overall, but at least we know the Amish aren't included in this.
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.