Already tweeted about it before, but if you're looking for an alternative to Core Data, have a look at BNRPersistence http://bit.ly/9P2hap
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
Already tweeted about it before, but if you're looking for an alternative to Core Data, have a look at BNRPersistence http://bit.ly/9P2hap