there are a ton of elements that make up a good site. the main pages (drupal, phpwebsite), special function services like documentation (latex2html), faq (phpMyFAQ), images (gallery), file store (read-only via apache, read-write via zope or webdav), search, maillist, the list goes on.
it's clear for this little list that in order for the user experience to be uniform across the applications there needs to be a common definition of users, groups for identities and authorizations.
this is nothing new, really. it is worth being explicit about it, though. that helps bring these elements to the fore front of the system. knowing what they are and how they can be accessed within the system.
