While you weren't looking this weekend, Facebook has changed your default e-mail address to your @facebook.com address. The Verge says this was a rare case of Facebook trying to protect your privacy: "...the point was to make everybody's personal email addresses private until each user unhides each one manually, since the site now allows more granular email visibility settings."
Facebook was stealth testing a new 'Find Friends Nearby' feature over the weekend that would show the Facebook users who were around you—think Find My Friends on iOS or Where You At? on Boost Mobile—but has now pulled the feature completely.
Creeeeeeepy. This shit had better be opt-in when it eventually comes back, because nobody wants to use a Grindr where everybody knows your name.