If you don't want Apple to collect personal data for iAd, don't forget to opt out here: http://bit.ly/bjtXrs
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
If you don't want Apple to collect personal data for iAd, don't forget to opt out here: http://bit.ly/bjtXrs