...I could perhaps try to recommend another one. To be honest though, using the Talkatone/Google Voice services, you also get free *incoming* calls, which I think is a plus. I've also found you can use Talkatone/GV overseas to call back to the U.S. to POTS lines. It's a hidden feature.

This should help you too, if you haven't already configured it like this:
http://blog.talkatone.com/2010/11/30/incoming-google-voice-calls-in-talkatone/