Our community clay studio has many conversations floating around, including "what can we do to help Australia?"
Here's another blogger's post, with a lot of other potter's efforts.
musingaboutmud -last-week-of-clay-for-australia
or Clay for Australia (www.facebook.com/clayforaustralia)
I wish I had known about it earlier. But sometimes the last week of something is how I find out it's happening.
Great links to other sources that are helping (and also clay products you can purchase.)