Official site: Reality TV Shows | Channel 9 | Big Brother Australia
First edition of BB in Australia in 4 years. The house is really nice, and the HGs so far are all funny and very friendly.
The game is structured like BBUK, and there are 6 highlight shows a week (no live feeds). The show airs Sun-Fri at 7PM local time, which is 5AM ET, 2AM PT. There are various after-shows that air on different days at different times (hard to pin down at the moment).
Episodes are currently available on a YouTube channel for people outside Australia who aren't awake at 5AM: BBAU00001 - YouTube
There is also a free TV streaming app for those who want to watch the show live; someone is running a channel dedicated to BB Australia: TVU networks - Live TV from around the world. Once installed, search for Channel 32017, "Timmyvision". It's usually a test pattern when the show isn't on live.