If Australia get knocked out I can make an arguement for supporting any of the teams:
Wales, their first RWC, how awesome would it be for them to win in their first go & they have been IMO the best team this RWC coming from the toughest Pool. Being of celtic stock (albeit Irish) I have to say I'd love for a celtic nation, any celtic nation to get a RWC win.
France, they have been IMO the most unlucky team not to have their name on the trophy, so close a few times, would be a great story from them if they could string together a great run & take out the cup, would be a great come back story for the coach & the players.
New Zealand, If NZ dont go all the way the nation may well be on prozac for generations to come. I'm not cold enough to wish that on any nation so I'd be happy to see the AB's win, if not for the nations psychological health then surely for Dan Carter.
So anyway it goes I wont be going against anyone if we dont make it.