http://www.qantas.com.au/info/m2006?lk=prau
"Book Qantas* during December 2005 or January 2006 and register for your chance to win an amazing world trip for 2 visiting six countries competing at the Melbourne 2006 Commonwealth Games. There's also a second prize of a trip to the Melbourne 2006 Commonwealth Games to be won."
Interestingly this promotion seems to be about both booking and flying Qantas during December and January.
Good Luck everyone! (After a RTW in enconomy, you might need it if you win!)
And to our international friends, Qantas has ignored you again. "entry is open only to Australian residents".