Security Summit in Adelaide - Feb 27 & 28
There's a Microsoft event coming up, on Feb 28. The website is at http://www.microsoft.com/australia/eforum/securityseminar.aspx, and it should be pretty good. Well worth the $220 that your boss will have to pay to send you.
But I've also heard that there is a community-based event the night before. This will be free of course. It'll be an abridged version, with a panel-based format. A whole lot of fun I imagine. And we'll probably pack the venue. After all, if ADNUG gets a good turn out, and AdSSUG has yet another record showing, then there will be very few spare seats.
My suggestion: go to both! The community event will be lots of fun, and give you a good chance to come along to an event that isn't during the day. And the full-day event will be a great chance to get out of the office and have a full-day of training, with everything that tends to go along with that.