I'd say he's a threat, he has loads of experience and has fought some tough, tough fighters. He may be on the downward turn of his career now, but he has enough knowhow and talent to make things very difficult. Katsidis's defence isn't great and he cuts, Casamayor could well take advantage of this. However I hope Katsidis wins, and think he will.
I'm also a fellow aussie and am certainly rooting for Katsidis. Casamayor is a very good fighter however and i've got to think he'd put in a better perfomance than his last outing against Santa-Cruz. But i think and hope Katsidis will win this. He has the punching power and output to trouble Casamayor and i think he wins by TKO or decision.