Thanks to hash9 a pluggable auth system is available for bitweaver cvs. My next big project is to backport this to bitweaver 1.3.1 for my purposes and hopefully others will benefit as well :D
http://www.bitweaver.org/wiki/Pluggable+Authentication+Tutorial

So I have a completed (somewhat) patch for adding mail authentication within bitweaver. This patch mainly serves my purposes and for the most part can be easily extended into a full featured mail auth function. The basics are covered, auth, create user in db if does not exists, and username collision which seems to be non functional in bw other than spit out an error if a name exists.

Please test the patch out and add to it, would like to see this move directly into bitweaver's future for ano…

Here is the beginnings of my attempt to implement mail authencation with bitweaver. this has been tested with 1.3.1 and doesn't work completely. im a little stuck on getting the authentication to actually trigger my function to test the user/pass of the mail server. Would really appreciate any help on this :)

http://people.redhat.com/astokes/patches/bitweaver/mail_auth.patch