Ask HN: How are you offering int'l phone support?

We're in the US and, for the past 9 years, we've had a US-based 1-800 number. We now want to add in a Great Britain/UK number and an Australian support number. These would be numbers that are local/toll-free to the residents in those areas.

What we need:

* Local/toll free phone number so that people in London/UK can call

* Local/toll free phone number so that people in Australia can call

* Ideally a way to call them back that routes through same service (and incurs no int'l call fees on outbound iPhone)

Any advice is appreciated. Right now, we're looking at Skype but it just seems this is not a primary use case for Skype.

Backstory: We have only two phone support techs so there will be times when someone calls that they will have to leave a message. To mitigate this, we'll have a login system that makes the phone number prominently displayed on all pages when the tech is online/in office. We figure that someone calling a local number is better than someone opting not to call at all (which is what typically happens to a customer in Australia/etc who is faced with paying for an int'l phone call).