Today, Facebook announced a feature the internet has desperately needed: anonymous, single-click login. Now, you can log in to apps using Facebook without sending personal information to the developer.
The new system is currently being tested with a select group of developers, including Flipboard -- Facebook says this group will expand over time. You'll see the option to login anonymously below the typical Facebook login. You can choose later to allow more personal information to be shared from your account (though it's unclear if you can share selectively). It's a nice option that allows you to enjoy the convenience of social network sign-ins without sending your wedding scrapbook and hand written confession notes to every developer on the planet.