The international reputation of Australian wine has never been greater, and most wineries have salerooms which offer wines available for tasting. Major wine growing regions containing large numbers of wineries you can visit are:
Barrossa Valley (renowned for its Shiraz)
Hunter Valley (Chardonnay, Semillon and Shiraz)
Yarra Valley (sparkling wines, Chardonnay and Pinot Noir)
The cheapest wine comes in 2 and 4 litre casks, and on average Australians drink twice as much wine per capita as Americans or Britons. 'Kangarouge' is the equivalent of vin de table.
If driving, bear in mind that the blood alcohol limit in Australia is a half-pint less than in the UK. Random breath testing is widespread, and in some states if you hit something, you face a compulsory breath test.