open-graph-protocol

What are the benefits of supporting Open Graph Protocol on social websites?

I'm developing a social website and am investigating interoperation with other services. One that seems to pop up fairly regularly is Open Graph Protocol. What are the benefits of providing the metadata required for this protocol? How widespread is adoption of this? Are there any tangible examples of how this can improve a user's exp...

FB Open Graph Check Login

I'm implementing a simple Facebook "Like" button on a voting site but want an option which votes using the internal "Like" system for anyone who doesn't have a Facebook account/doesn't want to log in (this may seem like an odd request but this is a requirement for the client). So basically I'd like a way of detecting if someone is logge...