jetstar virblue fares

From looking at jetstar.com.au it appears they've sold all the $29ers? How do I find if there are any left?

Virginblue has double the $29 seats and nearly all the flights are sold out http://www.virginblue.com.au/sale/seatsale04.html
Do you think the airlines will be offering more $29 fares?

I've been able to find some good ~$60 flights with good old qantas, so now's the time to travel huh?

Yet Qantas almost admit that they do it:
see http://www.qantas.com.au/info/flying/beforeYouTravel/ conditionsCarriage#jump
6

Whilst indeed you can't sell something that you know you can't provide, there is almost invariably a percentage of last minute cancellations and
"no-shows" which can be allowed for. Particularly those full-fare passengers who do not have any penalty applied if they don't turn up, those who miss their plane through traffic congestion etc. I doubt whether any airline in Australia has been prosecuted for following this practice.

I was lucky enough to purchase 2 tickets TWICE on the same plane to
Hamilton Island!!! It took about 12 hours of constant trying and yes, many times I got to the booking stage before they were then again sold. I was even lucky enough to help a friend to purchase 2 tickets from Newcastle to Brisbane return. All for the $29. The motto is definitely to keep trying!!!

i tried getting a $29er to tassie the first day they went on sale. 5 hours after they opened i finally got through and i had in front of me the chance to purchase a two way ticket. i hesitated for a few minutes, and when i finally clicked purchase, they had been sold. all that were left were $99 tickets.
however, several hours later whinging to a friend that i'd missed out, i randomly clicked the same dates i'd tried earlier, and there were some available! that time i didn't hesitate.
two lessons to be learned: if you have the chance, buy them!
keep trying, i think they may be offering them in stages/bundles.