The innovative VOIP service JaJah offers now an web interface optimized for the Sony PS3 to initiate calls.

JaJah is an interesting approach to use cheap internet based VOIP calls. The service still lets you use your normal land-line phones. It just bridges the long-distance with the internet.
With the PS3 interface you can now initiate calls to your friends right in front of your TV. This is how JaJah works on the PS3:
Users with internet access, enter play.jajah.com on their PS3 Internet browser. They will then see a new Jajah interface, where they enter their own phone number as well as the phone number of the person they are calling. By clicking the "Call" button, JAJAH initiates the call. In seconds, your phone will ring. At the same time, your friend’s phone will ring. You both answer and you talk.
More details on JaJah. Via N4G.