Whilst it doesn't take the place of an official course, I downloaded the Baby Sign app on my ipad. I think there are some free signs to see what the program looks like and then you can buy additional Auslan signs and also Amercian and British language signs.

My 1 year old loves looking at the cartoon babies who sign, but I wouldn't say he picks up much from watching them do it, it's only the signs I have integrated into our life that he remembers and uses.