This past September, Facebook launched a new feature that allows you to follow the Public updates of anyone that opts in. Millions of people are currently following figures like Mark Zuckerberg, Jessica Alba, Eduardo Saverin, Calvin Broadus (Snoop Dogg), Arianna Huffington, Tom Anderson, Kevin Rose, Erin Andrews, Jimmy Fallon, John Mayer, Fareed Zakaria, Sean Parker, etc. Even a random guy like me is being followed by some readers of Pulse2.com. Facebook is now offering a Subscribe button for websites to give visitors the option to subscribe to contributors in one click.
Once a user clicks on the Subscribe button, they will start seeing the Public posts of that person they have subscribed to in their news feed. Essentially you can consider it as being a widget for websites to subscribe to individual authors on your blog or news website.
[Facebook Developer Blog]