InterServer folks seem to be behaving unethically, and the end product is that they aren't really offering the backup service that they advertise at the moment. They also won't guarantee that they will ever offer it to us at any future time. We're using a half-assed replacement scheme, documented at BackupServices. Anyway, while this isn't the best way to remove your last to-do item, it removed it all the same, and so we finally reached the point of MemberMigration. --AdamChlipala