So what is a "friend"

Wonderful paper by danah boyd that I was reminded about from Scoble's blog the twitter fiend.

Personally - I am going to create an official friend linkedin policy after recieving numerous requests to recommend people to friends of mine. Some of those I was perfectly comfortable making - some of those I was not. How to handle the fact that people I barely know might be representing themselves as near and dear friends?

I so want "levels" of friendship in our open source social network!