I got to learn all about the Liberty People Service proposed spec. yesterday at their workshop. I was hoping I would just get to understand more about enterprise federation stuff. However I was very excited to see that it might be very helpful as a viable privacy protecting meta social network standard. At the conference this week there will be a demo built out based on the working draft spec. I am excited because it seems like a more viable privacy protecting system then moving around FOAF or XFN files with my entire social graph around. There are two white papers I am hoping to get through in the next two days..
Personal Identity
LIberty Federated Social Identity