Initiating Calls from Outside No. America (Score 1)

Hi. I'm living in Urumqi, a city in far western China. I've been using Big Zoo to schedule calls to the U.S., though--as noted in the initial post--that company is going under shortly. I'd be interested in finding a comparable service whereby I can schedule landline-to-landline calls via the web. All of the alternate services I've seen discussed in this thread seem to have one of two limitations:

• They offer VOIP or some other service where one end of the connection is a computer
• Or, the phone to phone connections (what I want) must be initiated in the U.S., by dialing a toll-free or local access number. (I can't dial such a number from out here.)

Do any of these callback services provide for a way to do as I've been doing with BigZoo: schedule a call via their website, ring my phone in China first, then ring the party I'm calling in the U.S.? There must be a similar callback site out there--I hope.