Last boom it filtered out from Sydney/Melbourn to Brisbane and at one stage Tasmania. Every state seemed to have its own follow on boom. There was also filtering out of Sydney to Newcastle, Wollongong then large regional centres in NSW. I missed nearly all of these last time (bought in Darwin which was last in the cycle to move-it is almost counter-cyclical). The Somersoft forum was a good place to get a sense of where the investor interest was focusing.