It's not that the seats don't exist. It's that QANTAS isn't releasing them to FF partners.
I tried to book QANTAS business class seats LAX-SYD-LAX for my wife after the Olympics are over, in late October/November 2000. OnePass told me QANTAS had released ZERO business class seats to CO for award purposes in September, October, OR November. Obviously they think they can sell all those seats themselves. Maybe things will change as we get closer to, any beyond, the Olympics. But in the meantime we had to be flexible -- I found plenty of availability in QF business class in the May/June timeframe.