Jetabroad's 10% cash back offer when paying with PayPal is back. Expires 31/Mar/2010 or when the cash back money runs out. Minimum $500 spend.
Offer went live 12/Mar/2010 and I picked up an ADL->SIN airfare during school holidays for $818 return. Bargain.
I won't vote negative in case I'm missing something here, but the prices quoted by this website are far in excess of other popular online travel agents, such as Best Flights, or even the airlines themselves.
EG: Brisbane to LAX, they quoted $2,000 when similar flights are around $1100. And Brisbane to Honolulu they quoted $7,000!
Just my experience, others may fare better.