linux.conf.au is the biggest Linux and open source conference in the southern hemisphere, and rightfully so! I was a speaker at the conference last year in Brisbane (the video is on my videos page) and had a great time.
This year it’s being held in Ballarat, Victoria, and I must say I’m quite looking forward to finding out what a regional LCA is like. Anyway, the CFP is open, I’ll be submitting again, and I suggest you do too. More details on the LCA website.