QF is sending emails to fill those TT empties and reduce the QFF risk
Limited offer: upgrade from Economy
Register for a Flight Upgrade Award
As you have booked an upcoming international trip that includes travel in Economy from Sydney to Auckland you may like to know that for a limited period until 2 June 2009, you can use your Qantas Frequent Flyer points to register for a Flight Upgrade Award* from Economy to Business.
Within Economy there are a number of different seat classes and your seat booking class is usually not eligible for upgrade. However, for a limited time we are lifting this restriction on seats booked in N, O or Q class and your seat is now eligible to register for an upgrade*.
To be eligible to upgrade you must register your request online at qantas.com before 2 June 2009. Telephone requests are not eligible. Please also remember that you can only register for an international Flight Upgrade Award from 90 days to 24 hours before your departure from your first port of origin.
More discussion about this
here