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.
A new Facebook feature has been made publicly available with not so much as an announcement. Friendshake uses your phone's GPS to find the people around you on Facebook and easily add them as "Friends." It's half cool, half freaky.