I think this list works as well as it does because it is semi-private, or
at least not as public as it would be if exposed via a web-accessible
archive. For now, it takes some forethought and revelation of at least
your email address, to join the list so you can read what's going on. I'm
not sure that participants would continue to be as candid as they seem to
be if the list were more "public" than it is now.
Gens