Get Vonage mobile app for Facebook and make Free unlimited calls to all your facebook friends around the world

Vonage is aggressively pushing their mobile app for facebook and i think they have all the good reasons to be doing that. This nice app let you make free calls from your iPhone, iPod touch, Android OS device and iPad using your WiFi or 3G connection.
Download the app to your compatible phone and share it with your friends and you can call them for free irrespective of where they are in the world. Its completely free to download and easy to use.
For more information and to download, check them out on http://www.facebook.com/vonage. If you use the app, let us know how it works for you via comment here.