As I said in the 4th Ashes Test forum, I think we head in to the final test knowing one of two things re: Mike Hussey's career: it's his farewell test (albeit earlier than he'd have liked) or it's the test that signals the form turn around ala Mark Taylor did in England before going on to equal the Don's highest Test score.
It's one of the other from where I sit. We aren't the oh-so-dominant team that can carry aging batsmen anymore unfortunately. If he fails, stick a fork in him and let's look at this: Hughes, Katich, Ponting, Clarke, North, Watson, Haddin .... [bowling attack]
I'd much prefer to be patient with a 20 y.o. destined for greatness than a 34 y.o. who has served us well in the past though shows no signs of improving.