Icons, FOAF, and (De)centralization
http://kasei.us/archives/2004/03/24/icons
"Now that LiveJournal has turned on FOAF generation for two million users ... [this plugin] has actual LiveJournal icons for anyone who posts a comment with a LiveJournal URL."
LiveJournal FOAF
http://www.livejournal.com/community/ljfoaf
"LiveJournal now exports FOAF data, including foaf:interests, foaf:knows, and contact information."
FOAF + Rendevous (or Zeroconf) = FOAFFinger
http://rdfweb.org/people/damian/foaffinger