I have had a Telstra phoneaway card for the past 5 years but the product is now relatively expensive because of the flagfall per call (44.5c+gst) and callings rates. Both have been increasing (despite of technology making telco services cheaper).
Unfortunately finding a similar product that works across borders will be interesting.
Make the most of Skype - free internet calls and cheap calls would be the most cost effective alternative but will require access to a PC or at least a wireless network. When I travelled to China last year I took a
SPH101 Support Page which allowed me to make calls from any internet cafe with a wireless network..or even outside a Starbucks where they had free wifi. I would buy a grande americano and make my calls back to Oz using their wifi, so not exactly 'free'.
Another idea may be for Mrs Ikara to carry an Oz mobile with global roaming, she sends you an SMS with her details.."I am at 'otel La Swank ph +41 xxx, call me in 10 mins, Love you xx". You then use Skype from your home computer to make the long calls to her. She has the security and convenience of a working mobile.
My thoughts.
Alby