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
Not every talk is going to get a public comment, so you may not hear back until we start making acceptance decisions a few weeks after the CFP closes. Of course if your proposal shows promise but needs some work, you may receive a comment before that.
Every proposal submitted so far has at least one rating and/or internal comment. Since we're in the blind phase I can't go into any more detail right now :)
