What are some good places to go shopping in Sydney?

Another month to go and we will be heading for Australia - Sydney to be more precise. We will be spending ten days over there and I for one intend to enjoy every minute of my time there. I love shopping and have been saving up so I am now looking for some good shopping tips over there. Anyone?

The Queen Victoria Building must be the best shopping mall in Australia, with more shops of all types than you could wish for! personally I love it! Apart from great shops (expensive!) they also have lovely places to do lunch. I am not saying that it is the only worthwhile place to go shopping, and of course I don't know what you are after, but if you are a shopaholic like me then you will sure like it.