If you've been reading drug articles lately, you'd see that the ice is coming from Thailand and other countries into Australia.
It's actually 4-methylaminorex.
It's similar to meth, but more potent. The high has some subtle differences, too. Sometimes you won't notice. Othertimes you'll be jacked out of your mind, but instead of wanting to talk you'll get really introverted. You can sometimes just really figure out a lot that's going on in your life from it. Last from 8-16 hours depending on the dose. It should come in large rocky chunks that resemble, duh, ice. Hence the name.
It's hard on your body, though. It's intended to be smoked. I know one person that says using it often has screwed up the enamel on their teeth from inhaling the smoke. It's also equally addictive as meth, possibly more so.
And I'm not positive, but it might not show up on a drug test since it's actually not an amphetamine. The chemical itself is made in a very similar process to meth, but it's actually more closely related to some of the compounds in the Amanita Muscaria mushrooms even though the effects are totally different.