23andMe: The Ultimate Social Network ( http://mashable.com/2007/11/19/23andme-the-ultimate-social-network/ )
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
23andMe: The Ultimate Social Network ( http://mashable.com/2007/11/19/23andme-the-ultimate-social-network/ )