I have recently read the Australian road a vehicle laws and skateboarders are classed as pedestrians. This means that if a car, bicycle or motor bike is involved in an injury that you sustain they are at fualt. It is not entirely clear but we have the right of way on bike paths or trails, on the road it is not clearly stated apart from the fact that it is legal to ride on roads that do NOT have a dividing line and are under 50km/h speed limit.
So if you are hit by a car or are injured by someone else on/in a vehicle and they are at fault do not just let it slide.
Ride safe guys, and please at least wear a helmet!
Edit: These are the laws for Victoria, they may differ slightly in different states so please check your states laws. I forgot about that at the time I wrote it