I need to send a snowboard from vancouver to Australia, does anyone know how to do it and who provide service?

It is going to be very expensive since the board is considered to be over-size. You should go to a sports store, and ask them if they will give a box so you can place your board in it for sending. The price is going to be based on length * height * width; then the result is going to divided by a certain number. The result of this calculation is going to be used as the weight you will be charged. For shipping, you have several options: In no particular order: Fedex, UPS, Canada Post, DHL, Greyhound Courier Express(Greyhound uses DHL for this service)..

Your best bet may be to find someone that is making the trip, and have them take it as luggage. You might need to pay them, or make some other deal -- but that would be the cheapest way to get it there. There would need to be someone to meet them at the airport to pick it up (and maybe give them a ride home -- that would be a nice touch) :)