Facebook founder Mark Zuckerberg went in front of the world's media this morning and grudgingly announced roll backs on some of the biggest and most controversial changes to the site's privacy settings made since December. The default setting for most content published on Facebook has not changed. It remains public, unlike the private nature of the site when hundreds of millions of people signed up, but control over a few key settings are now being shifted back into the hands of users. Users are now allowed to hide their friends list and their list of interest pages from the public at large.