Seek.com.au have got a job advertised for Aussies, asking them to move to San Franscisco:

Wikispaces Software Engineer
Wikispaces.com is looking for a software engineer to build and scale our quickly-growing web application.

This position is full time.
This position is in San Francisco.

We’re a small team working on a big site, and we’re looking for a passionate engineer to dive in with us. Wikispaces is a wiki host, providing easy to use wikis for a wide audience. There’s lots to do: designing and building new parts of the application, working on our front-end javascript and AJAX, squeezing a few more requests/second out of our web heads, working on our replicated databases and file storage. We don’t like big specifications or heavy planning processes; instead, we work on small projects, ship code frequently, and write lots of tests. We’re built on lighttpd, PHP, MySQL, python, javascript.

About the company:

About us

Wikispaces is the world’s easiest to use wiki hosting service. We offer free, subscription, and private label services. We’re a 2 year old company based in San Francisco’s South of Market district. You’ll be working with Adam, Bisma, Dom, James, and Sarah. We are creative and driven, we love bringing Wikispaces to new people every day, and we build great web applications.

How to apply

Send a brief introduction and current resume to jobs@wikispaces.com.

I guess there’s still heaps of those special Australian-only Green Card (E-3) visas that allow to work in the U.S. left.