The PSNA email discussion list is back under a new name: psna@portersquare.net
If you were registered for the old list at talkonline.us, you should have received a Welcome message with instructions for managing your updated subscription. New registration instructions can be found under "Email list" at the top of this web page, and at the list's general information page.
It's OK to ignore any messages you receive from the old list service at talkonline.us.