[Evolution] IMAPs troubleshooting, shared addressbook, calendar, tasks?

[Tom Cooper <tcooper starpower net>]

I'm making great progress on my shared email services for my home 
network, and I've taken quite a few notes that I'm outlining for a home 
network services howto.

I've got evolution, fetchmail, sendmail, procmail, spamassassin, imap 
server, and ssl, all running well and today I accessed my home mailbox 
from work securely using squirrelmail via https!

One important note is that now the box that is serving all of this (an 
850MHz Athlon with 256MB RAM) needs more memory.  Oops.  Guess it's time 
for a hardware upgrade!

I was getting REALLY excited to have all of these tools, getting ready 
to convert my wife's mailbox to imap, and then I realized that she needs 
an address book to store her contact information.  All of that data is 
presently stored in Evolution Contacts.

I think that I'm going to need to set up an LDAP server to store the 
information.  I have a couple of questions that are relevant to Evolution:
1. Is there a way that I can export contacts from Evolution in a format 
that can easily be imported to an LDAP server?  (I think that there may 
be a format called ldif for that?)
2. Is there a howto for configuring Evolution to talk to an LDAP 
server?  I've poked around a little bit at this with the LDAP server at 
work, and have had little success.

Two final questions: 

The first is related to secure IMAP.  I have imaps enabled on my server, 
and have set evolution to "Use SSL," and I've opened port 993 on my 
firewall, but could not establish a connection with the IMAP server from 
work.  Any idea how to troubleshoot that?

Lastly, I'm interested in hearing how others may centrally store tasks 
and calendar information.  Any suggestions?

Thanks in advance!

Tom Cooper