The perfect friendfeed in my mind

I just got to know Paul buchheit and his Friendfeed. I'm very impressed by Friendfeed.
Paul believes that "it's better, initially, to make a small number of users really love you than a large number kind of like you". Following this philosophy, he asked Friendfeed's users to describe the perfect friendfeed in their vision.

I just played friendfeed for a day. I have not got the big picture yet. Currently I only have a small feature request.

• Let the user choose what to subscribe. Currently when I subscribe a person in friendfeed, I got everything the person shared plus what he/she liked. That's too much information. I hope that friendfeed can let me to choose which service to subscribe from the person. For example, I may only follow his blog and flickr, not follow his twitter and facebook. Even better, I can put differenct service into different lists. For example, I can put persons A and B's blogs in a blogList and persons A and C's flickr in a pictureList. This way I can follow information I would like to get more conveniently.