We have long argued that Facebook (and other social nets) needs to
be more nuanced in the way they handle "friends" of different shades. It looks like this is
now happening.. Lets hope that one can also define different functionality per friendship group.
It will be interesting to see if the your status as to type of "friend of X" is visible to you, we have no conclusive proof but suspect that it is better to make it possible to be fairly invisible, since as humans we tend to manage the nuances of our relationships quite subtly. Making it clear that one is a "less favoured friend of X" may make on sever ties, or - worse from Facebooks point of view - lose interest in the whole thing.
On a related note,
this post by Donna Bogatin on Facebook's ability to make normally sane men swoon is very funny.....