There is a great line up at the Newcastle Jazz Fest this year. A couple of acts I have seen and know are great are:

George Washingmachine Quintet, Bruce Mathiske and the Jug-a-lug String Band

We are on on the 3rd and final day in the Marble Bar. More info here: http://newcastlejazz.com.au/index.php?option=com_content&view=article&id=58&Itemid=74