You now have me wondering if I shouldn't look into
a hardware upgrade
 capable of running mail lists.  I have the network capacity, just not the
 hardware capacity.  Honestly though I have no desire to provide such a
 service. 
    If things worked the way I suggested, you could add/subtract resources
to the "cloud" anytime you wanted :) And with distribuited processing,
hardware/network requirements would be waaaaaaaaay lower.