Well I don't have any real specific questions as such. The following questions do come to mind through: How mainstream is MailMan?3 years ago I needed a web mail product. When I asked the list, MailMan was one of the suggestions, and the one I went with.
Uhhhh.. :) There are *two* "Mailman" packages.. The Endymion one, and this one: http://www.list.org/If I recall correctly, the Endymion one is a webmail client, and http://www.list.org/ is a mailing list manager.