To avoid Launchpad list slowness, we would run the new openstack-dev list off lists.openstack.org. Given the potential hassle of dealing with spam and delivery issues on mission-critical MLs, we are looking into the possibility of outsourcing the maintenance of lists.openstack.org to a group with established expertise running mailman instances. Please let us know ASAP if you could offer such services. We are not married to mailman either -- if an alternative service offers good performance and better integration (like OpenID-based subscription to integrate with our SSO), we would definitely consider it.