I decided that I'd give an LDAP installation a try. Why not install an LDAP server on my local webserver and point all my email clients to that? Hmmm...
sudo apt-get install slapd ldap-utilsYou shouldn't have any errors - if you do... stop and pull your hair out (life shouldn't be this tough).
sudo apt-get install db4.2-util
sudo /etc/init.d/slapd restart
phpLDAPadmin is a web-based GUI for performing LDAP maintenance.
Well, in the end... after several attempts at setting it up, I finally got some data IN... only to find that I couldn't see it in TBird or Evolution. I need to try this again at some other point in the future. Maybe future Ubuntu releases will make this a trivial task! We can only hope so.