I have a myUS.com account and ordered a couple of things from Amazon merchants who don't sent to Australia.
But the combined shipping is going to be $50- almost should have just bought the items in Australia! So I want to order more things (if I need them!!) to try to maximise the value of the shipping costs...
(I won't bother if I can't find anything we need, I'll just pay it!)
pah I had the same costly mistake with one of the other shipping forwarders. I was happy to get things that I couldn't buy in aust though when they finally turned up. You could try getting some clothes from jcrew or somewhere like that that use 51global, because if you shop on their american site the clothes are so much cheaper.
I bought some clothes from Macys recently and each item's price increased by $5-10 once my location was set to Australia. Bluefly had a significant jump in prices too . So it might be worth having a look at sites that DO ship to Australia if you have favourites, as they may be quite a bit cheaper.
I think PPs are also onto something with makeup. I was recently recommended a mascara (Loreal Volume something or other) that is $30 here and only $6 in the US!!