Hi Attagirl - this is one area I can definitely help with.
if you are from Australia and under a certain age (it was 28 when I applied) you can come work here on a Working Holidaymaker visa, which allows you to work one year full time OR 2 years part time - though you aren't supposed to further your career - they really want you to take bar jobs etc to 'fund your holiday'. If you are not in this category, then you can get a company to sponsor you - this means they have to submit forms to the Home Office (this is the UK's immigration department) to prove that they cannot find someone with your skillset locally. I've been able to do this 3 times, so it's not as hard as it sounds, depending on the industry you work in. If you are not in the UK, then you will need to find a job before you come and get transferred with them.

Hope that helps!