That's a real shame. I have friends in Vic (Melbourne-area) that I haven't heard from.
Having spent two months in Aus in '03, I can tell you that they don't need arsonists to start bush fires. It's a wide open country with land mass nearly equal to the USA, but only as many people as the NE Corridor. During the dry season, it's super easy for bush fires start and the openness coupled with winds and lack of precip cause them to spread quickly out of control. I was nearly overcome riding my (rental) 100th Aniv. Wide Glide on the motorway heading north form Surfer's Paradise towards Brisbane from the wildfire smoke on the Gold Coast...and the fires were miles away!
Anybody who deliberately started those fires that claimed lives and property should be punished to the full exten allowed by law.