Done it twice myself. Adel-Perth. If you have time stop at the Great Australian bight whale lookout, it's pretty cool. also ther's a servo/road house that has the large remains of when skylab crashed. I did it in 4 days but i took it easy, had plenty of stops etc. Prepare to be raped on food and accomadation. Keep an eye on the road for roo carcasses and wedge tail eagles. I encountered a few emus also. In all honesty, the road is pretty good and you see shit loads of Caravans and motorhomes etc, it's certainly has some traffic. Keep an eye on your speed limit within 15 klicks of any town.
EDIT, didn't see the 2nd page DOH!