Successfully got Optus to unlock my iTelephone, also upgraded to the 3.0 software at the same time. I NEVER get full bars on the Optus 3G network in Australia, go SingTel! (The irony isn't lost on me that I bag out Optus while praising SingTel by the way!)
There's something poetic about having a phone connected to a Singapore network that has a weather application for Australia. Is poetic the word I'm thinking of? Maybe I meant grilled cheese sandwich. Yeah, that works.