Hilariously it was dropped with no real notification, and one day my account just stopped working. I had to make a new one, because there was no way to access my previous account.
No where in that headline does it mention OpenID -- and I have no idea what ClickPass is. Nor was it a persistent announcement; it was just a regular story. Perhaps I didn't even check HN that particular day?
There are many ways they could have notified OpenID users that would have worked -- this wasn't really one of them!