I'm going to be in Sydney for ten days in mid-November. Australian fabbers, any packing tips? I'll be at a conference - should I expect the freezing cold AC we have in the US? Do Australian academic types dress up? Long-range weather forecasts seem to be hovering in the low 20s. Where I'm from that's summer and everyone is wearing sandals, sleeveless tops, etc - where I live now that's jacket weather.

For that matter, any other Sydney advice?