yet another reason to jailbreak your iPhone: http://techcrunch.com/2010/02/26/grooveshark-iphone-app-cydia/
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
yet another reason to jailbreak your iPhone: http://techcrunch.com/2010/02/26/grooveshark-iphone-app-cydia/