The IMAP server providing access to the list archives is ready for use. You can find instructions for configuring clients at <http://trac.tools.ietf.org/group/tools/trac/wiki/Imap> Please help improve the instructions for various clients at that wiki.The tools-discuss list (copied) is a good place to help each other with configuration and talk about the service.
If you discover errors, please let me know. RjS