http://www.foaf-project.org/ http://www.foaf-project.org/ is one of the main standards. http://code.google.com/p/xoperator/ http://code.google.com/p/xoperator/

http://www.foaf-project.org/ http://www.foaf-project.org/ is one of the main standards. http://code.google.com/p/xoperator/ http://code.google.com/p/xoperator/ is a bit weird, but I think has some of the right ideas of the distributed SN.