Vonage has launched a new application for the iPhone, iPod Touch and Android handsets that will let you call all your Facebook friends for free. Your friends will also need to use the application, and you will need to sign into your Facebook account through the application.
The Vonage Mobile app works over both 3G and WiFi and it will allow you to call your Facebook friends free of charge, wherever they are in the world.
You can see how it works in the video below.
It certainly does look interesting, and the fact that it works on the iPod Touch and will work on the iPad as well could make it a very popular application. Have a look and our article on Android vs iPhone to see which smartphone and mobile platform is best for you.