MattyP, you'd do it in a couple of weeks, easy!
Frosty, I think of the landscape behind glass, not the people. One of my friends is nearly permanently on the road nowadays, and I think the nomad lifestyle and maturity means you're more considerate drivers. I think of the escort given the Rebels every time the police here single out cyclists - and that was the second video after a heap of stills. Big escort! Half a dozen bike cops passed us near Yalata, heading back to Adelaide I presume.
UJ1, the short answer would be 'very little'. I especially loved my sleeping bag, camp shoes and handlebar sling, and the tent is great. I'm going to do something on the sleeping bag for sure. It makes me want to go to bed early.
And much depends on where you're going and for how long of course. But for that trip, I'd take a fly net and a better mirror. I didn't like the taste of water from the Ortlieb water bag but the Dromedary was tainted too, but less so. Tyres are always debatable - weight vs hassle. And camera - nice controls and less lag on a DSLR vs the manoeuvrability and weight of the compact.
But comparing against my packing list for this trip, I could get rid of 500g without sacrificing any comfort or tubes.