I too am a complete newbie and need an Australian power supply/cable for my Pi. Can anyone recommend one that works well?
I bought one off the internet that was rated 5V and 1000mA but it was very unstable. I didn't realise it was the power supply and thought I must have had a dud Pi until I unplugged it and plugged in my dad's phone charger instead, out of curiosity, and all of sudden it was stable - and his charger is only rated at 700mA.
So I'm thinking some power supplies, despite their rating, are better than others - so anyone in Australia that has bought one and is tried and tested, I would love to hear from you