Theres a program called 'maildirdeliver' at the qmail.org page, which
takes an email on input and delivers it into a directory with Maildir
format. A program like this can be set as default delivery on the system
or in a personal .qmail file in your home directory.

I was thinking this program could be modified to deliver messages properly
on a coda filesystem, and then the pine c-client distribution could be
tweaked to work on it as well. That would provide imap, pop, and unix pine
access. Covers everything I need when dealing with mail :)

I've been using a coda partition so far for storing named (bind) domain
files, so far just small config related files, which has worked well. I
think I'll finally get mail working on it now too.