Digital Classicist runs a discussion group/mailing list through the JISC mail service, which is meant both for the discussion of the Digital Classicist website and service itself, and for the raising of issues of concern to scholars of the ancient world who use computers.
To join the group using a web form, go to the following page and follow the instructions on-screen: http://www.jiscmail.ac.uk/digitalclassicist
If you would prefer to sign up via your email account, simply send a message with a blank subject line to email@example.com, the body of the mail containing only the words
(no signature text, etc.) You should be sent a confirmation email by the listserver.