The Australian Institute of Sport website should be the first point of call for Australian coaches looking for information on sport science, particularly Nutrition and Performance Psychology. The Nutrition page in particular has plenty of FAQ sheets and a comprehensive overview of supplements.
Other Sport Science/Coaching links:
The AIS website also has a really good section on general coaching resources, with fact sheets and sections on topics including Safety and Ethics, High Performance Coaching, Coaching Children. Some of the material is covered in the AIS online Community Coaching General Principles, which is a requirement for all registered SSA coaches, while other parts are handy reading for teachers, parents or even athletes.
The Clearinghouse is an Australian Sports Commission led information and knowledge sharing initiative. Anyone can sign up as a member, although some services and resources are restricted due to licensing arrangements. Basically it’s a good place to find the latest information and research on a wide range of sport related topics.