The PER lounge has removed the boards from the tables with the password. It's still the regular one, but it's now on a card at reception that's handed out.pretty sure it has been that for months in MEL, convenient since you can autofill it.
I don't know that it is much of a problem, I don't recall getting a connection outside the lounge in MEL - will give CBR, MEL and BNE a test this weekend
I'm assuming they'll change it again some time. They should do what BA does; have it as a scrolling ticker at the bottom of the Flight Info boards. BA's is always a city name as well, so you know what you're looking for when you glance at the scrolling text.