On our site (http://lists.psas.pdx.edu) we have a list (psas-team) which automatically includes the subscribers from any other PSAS mailing list (except psas-announce). This makes it easy to have a list for each team and a list for anyone on any team. We use a custom script to aggregate the subscribers regularly. Ideally we'd like native support for this in mailman instead; we'd like to create a list and say "automatically include the subscribers of the following lists as subscribers to this list". (Bonus if we can say "all lists of the form psas-* except for psas-announce".) We'd also like the ability for people to subscribe directly to psas-team, without having to subscribe to one of the other lists; currently we use a fake list psas-misc to feed people into psas-team, but this seems like a hack.
The "sibling lists" feature (in particular, regular_ include_ lists) added in Mailman 2.1.10 can do essentially your first request (accept a list of lists whose members are automatically added to the recipient list of a post to this list) as long as you don't care about digest members.
See the section of the FAQ at <http:// wiki.list. org/x/TIA9> beginning with "With Mailman 2.1.10 or later" for a bit more on this.
Will that satisfy this request?