NZ citizens can work and reside in Aus, permanent residents cannot. But it's also worth noting that since a 2002 law change, Kiwis who make that move are considered temporary residents in Australia and don't have the same rights there as Australians:
http://www.abc.net.au/radionational/programs/lifematters/kiw...
http://www.indymedia.org.au/2011/04/21/help-appeal-for-a-fai...
As an extra bonus... With a NZ permanent residency, I believe, one is also permitted to work and reside in Australia; easily the outstanding economy and often top placed in most living standards, job opportunity and economic and political stability surveys. By way of example, Australia's current head of state and head of government are women.
If the USA continues to put up unnecessary barriers for up-and-coming entrepreneurs to stay in and benefit the US, why not take your business ideas elsewhere?
Frankly there are many more places in the world to live and prosper financially. We live in a global economy, so location should not be always of prime importance for a web-based startup, or...?