Best i can do is a sub-family here John, Araneinae, which Robert Whyte's www.arachne.org.au describes as thus:
"Araneinae is usually considered the largest subfamily of Araneidae in Australia, having more genera assigned to it than any other. It has also been the most in flux as many of its genera were dumping grounds for large numbers of species."
Nice spider and always try and get a front on shot if possible as eye patterns/arrangements in spiders are often a critical factor in identification.....