Facebook CEO Mark Zuckerberg has just written an open letter to Facebook users regarding a privacy overhaul that is due to hit the site in the next few weeks. Soon, users will be able to selectively choose who each of the updates they post to the site is visible to. The site is also going to remove regional networks entirely. If these changes sound familiar, it's because Facebook actually annouced them way back in July . From Zuckerberg's letter: We're adding something that many of you have asked for — the ability to control who sees each individual piece of content you create or upload. In addition, we'll also be fulfilling a request made by many of you to make the privacy settings page simpler by combining some settings. If you want to read more about this, we began discussing this plan back in July.