OpenID (http://openid.net) extended with Attribute Exchange (http://bit.ly/Ol2Uo http://axschema.org) makes all sorts of ponies feasible
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
OpenID (http://openid.net) extended with Attribute Exchange (http://bit.ly/Ol2Uo http://axschema.org) makes all sorts of ponies feasible