Hi,
I would just like to share one of the great deals I was able to get while in China. Have you heard of the service called Net Callback (
www.netcallback.com)? Its a company that allows you to make cheap international calls (only 6 cents USD from China to the US). The good thing about their service is that its prepaid and you can use your mobile to make your calls. Check their site out it might just be what you are looking for. Cheers!!!