WorldWide Telco is boasting that it will offer new features, which it feels, and I tend to agree, will be the decision point for how companies and consumers decide on a VoIP provider.
What makes WorldWide Telco unique as a carrier is they are using their own equipment end to end, something that is both good and bad. The good is control. The bad is what happens when standards get broken.
The one feature mentioned, about calling a number and it the call not being completed,