Nutri-Tech on the Sunshine Coast runs a regular course in organic farming. The next Certificate in Sustainable Agriculture is in March 2012 and is being held at Nutri-Tech's facility at Yandina. A course outline and costs are provided on their website, with a similar course being run in Victoria by the same company.
It looks interesting and comprehensive (four days + field day) and I would be interested in attending if it weren't for a little bit of a financial squeeze likely for the next 12 months in our household. Nevertheless, it might be something you are interesting in attending. Let me know what you think if you do manage to attend.
If you are interested, there are discounts offered on the course costs if you're an eligible primary producer, which can be claimed from the government (FarmReady program).