Friendfeed- smart subscriptions are key
Just got an email that someone was subscribing to my Friendfeed and I went to check them out. I won’t give any names because it’s a private thing but looking at this person’s subscriptions I found it cool to be in good company:
As you can see smart subscriptions are the key to getting the most from Friendfeed. 
What I really like about FriendFeed is that you see the actions of “friends of friends”. You can always hide these on an individual user level, but I’m uncovering great nuggets of info from these links. If I start to see myself clicking links from a “friend of a friend”, I use that as my barometer of interest and then I add them.