SOOOOON...ish.pic.twitter.com/1H1jFdd2GL
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
Ya that's what I figured. Love to preorder it now but willing to wait and hear more. Can I come down and try yours when you get it? 
Twitter may be over capacity or experiencing a momentary hiccup. Try again or visit Twitter Status for more information.