Just a quick note to let you all know that for the first time we are now recommending that our users consider using Mozilla with the FastMail.FM webmail/IMAP service--good work! See the recommendation here: http://www.emailaddresses.com/forum/showthread.php?threadid=1687
Note that bug 27002 is still a major issue for us, because all users have to edit the default configuration to avoid uninformative 'permission denied' errors: http://bugzilla.mozilla.org/show_bug.cgi?id=27002
