Event Promotion Websites...

ABC Events
http://www2b.abc.net.au/EventCentral/View/Search.aspx?p=0&ci=0

Live Guide
http://www.liveguide.com.au/Submit_Event

Sydney Showcase
http://www.sydneyshowcase.com.au

Time Out Sydney
http://www.timeoutsydney.com.au (email)

2MBS FM
... radio advertising...

The Australian Tourism Data Warehouse.
http://corporate.tourism.nsw.gov.au/Get_Connected_p582.aspx

Arts Hub
http://www.artshub.com.au/au/arts-events/

ABC Classic FM
http://www2b.abc.net.au/classic/diary/diaryinput.htm

Limelight
http://www.limelightmagazine.com.au/Events/Submit.aspx