Truphone just let me know that they have launched a very simple BlackBerry app. The Truphone Anywhere application simply asks whether you want to make a Truphone call whenever an international number is dialed. If you click accept the app first dials the local Truphone server as a local call and then connects you over Voip to your international number.
Just to get you to install the application Truphone is offering $1 of free credit when you sign up. I don’t know if you need to give them your billing information for that but I would check before signing up. Their claim is that Truphone reduces international call costs to as little as $0.06 per minute from 33 countries around the world.
Check it out at www.truphone.com/blackberry/