Alex, the spy module doesn't even come close to what we're talking about. What are we supposed to do with the Spy feature, other than sit there and look at it? We are talking about an interactive activity feed that is an aggregate of you, and your friends walls, all in one place.
The easiest way for you to understand, would be to go join facebook, and see for yourself how a well designed activity feed works.
The easiest way for you to understand, would be to go join facebook, and see for yourself how a well designed activity feed works.