A listserver is an email address that distributes messages to a bunch of people. WSO hosts listservers for student groups broadly defined, and other organizations around campus/Williamstown. You can apply for a listserver at http://wso.williams.edu/lists/create, and we'll try to get to the request in a few days. A complete list of WSO listservers is available from http://wso.williams.edu/mailman/listinfo.
WSO uses Mailman to power its listservers. [[Jessica Chung]] (jchung) is our list admin. Contact her with list administration questions.