Best Service for Doing Online Interview?

[moneytime]

What service would the members here recommend for doing phone interviews online?

I am looking for:

1.Reliability
2.Price (I have seen from 3c/minute to 10c/minute).I do not want to pay any monthly or membership fees.Just pay for what I use when I need it.
3.Ease of use.I would like to be up and running quickly without any hassle.
4.Can deliver the file in mp3 at no extra cost.

I have a friend lined up to do a trial run.I just have no idea which service to trust and not get stuck with some hidden fees.

Also, what is the best type of phone to use (cell,cord,or cordless)?

Thanks for your help.

David