Distributed versus hosted FOAF

Marc Canter defends the notion of hosted FOAF-speaking soscial network services in a dispute with those who argue for a more “distributed” approach. He is responding to
Cory Doctorow (Towards a non-evil social networking service) who quotes Foe Romeo (My social network ideal).
In his comments, I suggest that these two goals are not really at odds. The really issue is interoperability between hosted and distributed implementations.
(A note on chapter assignments to blog entries: Many technologies apply to both 7 (business networking) and 8 (dating), so I will log some entries to one category when they could as easily come up in the other. Multiple categories are possible but cumbersome.)