f8. After f8: Implementing the Open Graph Protocol around the Web - We shared an update last week about the products launched at f8 and that over 50,000 websites have already implemented the new social plugins to become more personalized.
We created the Open Graph protocol in support of social plugins as part of our efforts to help realize the vision of the Open Graph. Any website can implement the Open Graph protocol. It allows any web page to become a rich object in any social graph, making it easy to find what people are liking across the Web -- from a movie to a blog. To start integrating the Open Graph protocol into your Web pages, read our documentation.
The Open Graph Protocol Design Decisions. The Open Graph Protocol.