expired Return Business Class Airfare BRUSSELS-SYDNEY ~$2,200 (Finnair/Cathay Pacific/Qantas)
This was posted 5 months 26 days ago, and might be an out-dated deal
Fare must originate in Brussels or Amsterdam (not the opposite direction from Australia), so this bargain isn't for everyone, but for Aussie expats in Europe, those with friends/family in Europe, or those willing to book this fare in conjunction with another fare departing Australia this is one of the cheapest return business class fares I've ever seen between Europe and Australia.
Flying FlyBe (Finnair codeshare) between Brussels and Helsinki, Finnair between Helsinki and either Hong Kong, Bangkok, Osaka, Tokyo or Shanghai. Depending on the layover in Asia you chose, Cathay Pacific, Qantas, Jetstar, Japan Airlines or British Airways (Finnair codeshares) to Sydney, Melbourne, Brisbane or Cairns.
My recommendation would be Cathay Pacific through Hong Kong, because of the excellent lounges at HKG as well as the excellent new business class cabin they use on certain flights between HKG-SYD/MEL/BNE. Probably goes without saying you should avoid at all costs any itinerary that includes a leg on Jetstar, when there are full service options available! :)
Only available at finnair.com. Select 'multiple destination' and 'Business' class on the booking form, BRU-HEL (or AMS-HEL) for flight 1, HEL-SYD (or other Australian city) for flight 2, SYD-HEL for flight 3 and HEL-BRU (or AMS) for flight 4. Dates are up to you — most dates in 2013 are available, I think. Price should be about 1,780EUR including all taxes; fare class is a class I 'Business Saver' fare with change and cancellation restrictions (fare rules state 25% cancellation charge). Price is about 2,400EUR if you need to head to MEL or BNE instead of SYD.
Ask in comments if you have any questions — I'll do my best to help. :)