OK, let me start by saying I've searched and:
turned on email notifications in the admin panel
made a PHP script to test my host's installation of PHP (worked fine and emailed me)
modified my class.ticket.php file per (http://www.osticket.com/forums/showpost.php?p=6576&postcount=14)
Nothing seems to be working. No emails are sent at all.
Any (more) help would be greatly appreciated.