We're getting some press on the issue too. The more the better. One of the committees stop accepting submissions on April 13 (Easter Tuesday) and the other on April 30 - not long to mobilise the Free and Open-Source community in Australia. Please do your bit where you can.
hypatia: You aren't allowed to make your submission to either the lower house or senate committees public at all. The committee will make submissions public later at their own discretion. Linux Australia is combatting this by making their position paper available on which their submission will be based.