I'd rather not see the MacPerl mailing list turned into a newsgroup, but that is probably because of the way that I read mailing lists and news. I read both using the nn newsreader, so that the mailing lists are threaded just like newsgroups. The mailing lists have the keep their advantage of being lower volume and remaining better focused. The only advantage to a newsgroup would be the added news features like crossposting (when used intelligently), Followup-To, and Expires headers when appropriate.