Email when selected threads have new replies. Should only send 1 email per subscribed thread until the user logs in again, though, to prevent spam.
[fixed] Notification for thread updates
Success on the last notified date update. Now when I post this, I should see no email.
Reopened. notifications sent upon draft save, not just actual save.
notifications sent upon any successful reply now. Will continue working on a way to tell if someone is actually logged in vs. simply having been logged in, but for now this is done.