Just thinking out loud.

There is an interesting constraint inherent in the Newspaper UI (NUI) metaphor.  Newspapers are things where blogs are places.  Location of things are usually either temporary (camera in my office) or relative (camera in my pocket).  With personalized newspaper, it is difficult to talk to my friend over the phone about an interesting article on the frontpage of today's Just for Don Morning News if the content of the article (blog posts) has been taken out of its context (blog itself) in order to weave together a story out of multiple posts from multiple blogs.  Hmm.