Definitely a max of 2 FC seats. I have seen them searching to QF rewards site, although difficult to find. I myself redeemed an F award JFK-LAX-MEL-SYD-LAX-JFK last year. Its not easy but doable. I would NOT expect any luck around holiday times.
The biggest hurdle is the fact that QF members get avaialbility 360 days out. Most of the times around holidays are snapped up by them.
CO, US, AA etc have tp wait until 330 days out.
Needless to say, if you are looking for Next June, you may already be too late. 330 days from next June 30 was roughly July 30, 2006. Right now, the window should be open to roughly July 15, 2007 (roughly 330 days). Incidnetally, this was about the time of my trip.