I'm in Adelaide; however, I move about quite a bit each week because of work. Please let me know when the Sydney and Melbourne people get together as I might be able to drop in.
Some Brisbanites in this thread, too, which is good. A few of us tend to meet up every few weeks for lunch or coffee in the city. Anyone interested in joining us, please feel free to send me a PM and I will let you know of the details the next time we meet up.