Out of intrigued I started watching the latest series of Big Brother Australia on youtube. Mainly just to see what the crack is and if it's any better since (IMO) the shower of shite that Channel 5 has become. Admittedly and obviously being in Korea, I haven't watched any of the UK series, so can't comment on it's quality.
Anywho, the Australian version is not bad. Good twists and housemates if a little bit sloppy on the editing.
Here's the launch night, and the full series is currently being uploaded on youtube. You can even vote on evictions through their facebook page - not sure if you need to pay as I don't vote.
My favourite so far is Tim.