Mail Redundance is A Good Thing
Sean questions the validity of the email paradigm in an age where you could simply publish URIs that allow people to access the stuff intended for them instead … I remember that — with smaller scale, of course — Lotus Notes had (and still has) a feature called “shared mail”, enabling you to avoid useless copying and keep references to email documents instead. I also remembered that the one time my former company enabled it, it worked great for some time — until the first system crash not affecting your machine at all took away data that was so transparently stored elsewhere you never noticed.