I like LISTSERV, but it isn't yet perfect.  :-)  Here's a list of my
LISTSERV wishes (in no particular order):
 
(1)  A way for LISTSERV postmasters to send email to all list owners on
     their own server.
 
(2)  A command to change email addresses.  For example:
 
     CHANGE listname olduser@oldhost newuser@newhost
 
     Wildcards should be allowed.  It would be very userful when
     massive changes in email addresses are made.  List owners should
     be able to do it to their own lists and LISTSERV postmasters to
     any list or to all lists at once.
 
(3)  Automatic deletion of archives when they reach a specified age.
 
(4)  Activity statistics by list and filelist for a server.  Disk space
     usage by filelist.
 
(5)  A way to permit some people to create lists without intervention
     by someone with root access on the LISTSERV machine.
 
(6)  Simple gopher and WWW interfaces to list archives.
 
(7)  A way to allow list owners to store files that will be accessible
     via anonymous FTP, gopher, and WWW, as well as by LISTSERV
     (assuming that the filelist for the list is accessible).