PBCore for publishing, sharing, and preservation

I'd like to shine some light on a good conversation that has popped up about the uses and importance of syndication and metadata on an Integrated Media Association blog.  See Jack Brighton's post with this title, John Proffitt's post, RSS a good start, but a federated PBCore-based metadata archive would be better, Dale Hobson's post, Thoughts from back home: centralize output, not input, and also the comments on those posts.  --Dennis