I think the main difference is that with twitter its a one way following. You can follow people and they can be completely unaware. With facebook you have to ha

I think the main difference is that with twitter its a one way following. You can follow people and they can be completely unaware. With facebook you have to have the two way yes we both consider each other 'friends'. To actually beat twitter/friendfeed they would have to allow a 'stalker' relationship. So you can stalk someone without being their friend.