I have implemented my
new trust metric, and applied it (fairly crudely) to LiveJournal friends lists as an experiment. The result is a tool that tells you who is "closest" to your friends list who isn't actually on it, like "popfriends" but more sophisticated.
Who is closest to your friends list? Let me know how plausible the results seem to you. Note that the top few people are nearly always people you don't have on your friends list "on purpose" - in my case, largely because I've moved away from Edinburgh and so I'm trying to resist the temptation to add even the loveliest Edinburghers to my friends list.