Amazon's AU landing page is up for Prime with their introductory rate. It will cost US$5.99 (~7.89 AUD) / Month after the introduction offer.
Prime Shipping is "Coming in the Future"
Introductory price of US$2.99/month after 7 day free trial. Membership renews at US$5.99/month after 6 months. Cancel anytime. Twitch Prime is included with every Prime Video membership. Once Prime launches, Prime Video and Twitch Prime will be included in the price of your Prime subscription.