The process is as easy as going to a website (https://www.eta.immi.gov.au/ETA/etas.jsp), putting in your passport and personal information, and paying $20 per person, but, still, you need a visa.
The airline didn't tell me. I had no warning. I found out from a random website while doing travel planning. So do a bit of research to find out whether or not the country you're going to visit will let you in before you get there.
I'm glad this worked out okay for us.
