Canon Australia still list it on the front page of their camera section, 550D and 1000D are still there too, otherwise there's only one model-per-line.
Let it never be said that Australia gets tech first, or cheap, or even ever sometimes though.
Last time I personally saw a 1Ds3 in a shop or online, it was in Vienna mid-2008, most online shops don't have it in stock, or even in their stock list anymore that i've seen (mostly dutch and australian shops).