Voixio - Free phone calls over the internet

Today via a little article in .Net magazine I came across Voixio.

It's like Skype, but runs in your web browser and as long as you watch an advert the calls are free. I managed to call my mobile, home and office all for free. They quality isn't that bad, not as good an a normal telephone but just as good as Skype, and like Skype if you have a proper headset it would work even better.

What is also good about the Voixio system is it supports video, this means you can have a video chat with other Voixio users or even with 3G mobile phone users. I was unable to try either of these so cannot comment on the quality, but it seems very cool!

http://voixio.com/