" It's also probably a good idea to add some mechanism to identify users with reliable indexes and allow others to use them" Yup, social graph wasn't the right

" It's also probably a good idea to add some mechanism to identify users with reliable indexes and allow others to use them" Yup, social graph wasn't the right choice of words on my part. I was thinking about something like twitters "follow". For example, you could go around a follow a bunch of well known programmers. I don't like the karma idea, at least not at a global level. I think it has to be about trust, at an individual level. These are the people I trust, search their bookmarks.