I just installed Mailman 1.0b8 on a Cobalt RAQ MIPS based Linux machine and it's working great for the most part. Kudos for an excellent piece of software.
I think that I've stumbled across a bug in Pipermail, but I'm not sure exactly what caused it or how to duplicate it. The header from one message got attached to the body of a second. I'm thinking that it has something to do with the goofy MIME-encapsulated HTML that the first message was sent in.