The issue isn't publishing, or even selective publishing, it's smart aggregation. You'd still need a solution like a feed reader or a site like FriendFeed. And

The issue isn't publishing, or even selective publishing, it's smart aggregation. You'd still need a solution like a feed reader or a site like FriendFeed. And even then, you don't have the interactivity of FB with the ability to "like" content, comment, and tag. It's the content that brings people to FB, the opportunity to see who's up to what, look at funny photos and chat and gossip with friends.