I concur for any Aussies (or Kiwis) looking for DD products. I wanted a DD Tarp a couple of months back, and went to DD in the UK to order it. They put me straight onto Jeff at AMTC Gear, who couldn't have been more helpful and prompt with delivery. I have also just bought a DD Frontline Hammock from him at AMTC - very simple online order, and FREE postage for orders over AUD $100, and quick delivery.
Oz dosen't have the range of trekking strength hammocks as can be found overseas (my Clarke and Hennessy had to be sourced from the US with the accompanying shipping costs...). If you're in Oz or NZ and chasing a DD - look no further than AMTC Gear.