Post Office directories are helpful in tracking family migrations from Sydney to other areas of Australia. Many business, alphabetical and street directories have were published commercially eg. Sands Directories in Sydney from 1858 to the 1930s
People of all ages are researching their Family History, even school students as part as their history studies. Family History is like a jigsaw puzzle. Collecting all the pieces to result in a final picture.
A collection of some of the Australian mailing lists form Rootsweb
A range of websites for Aboriginal Family History research.