Two nights ago (Mar 6) I attended the Microsoft Security Interchange event held in Melbourne. It is a series of free informal security related seminars held across Australia conducted by Microsoft employees (including my fav security speaker - Steve Riley) and local Aussie MVP (Rocky Heckman, Visual Developer - Security). I encourage those people from Perth or Canberra to register for this event, while the tour is still running. Overall it's worth the time to attend.

Since I'm on this thread, Steve Riley and Jesper Johansson (another excellent MS security speaker) are presenting on security topics around the world. Check your local MSDN/Technet events calender or this link to see when this fantastic duo are in your area.