"Between now and 30 June 08, book a flight on AirAsia X between Perth or the Gold Coast and Kuala Lumpur and pay using PayPal and you will receive $50 cash back in your PayPal account."
And a bit more info:
Limited to the first 4,000 ex-Australia bookings. Get in quick! Flights and fares are subject to availability. Seats are limited and may not be available on all flights. Fares include airport taxes, surcharges and fees. Travel period 1 Jul 08 - 25 Sep 08. All fares are one-way on the web and are in Australian dollars unless stated. Air Asia will credit your PayPal account two weeks after the end of the promotion."
Brilliant if you snap up a bargain fare too :)