It looks like it's going to get tough out there for the mobile operators ...

It looks like it's going to get tough out there for the mobile operators. People like Truphone, Rebtel, Roam4free, Fring and others are coming up with new and innovative ways to cut the cost of calling from mobile phones, particularly for international calls. Using the Internet to deliver the call enables these people to slash the cost of calling. As they start to take market share it will be interesting to see how the mobile operators respond.