Carriers testing Mobile VoIP on their networks

Good news from GigaOM: mobile phone companies Verizon, Clearwire and Telefonica O2 (and hopefully others to follow soon) are beginning to roll out VoIP services over their networks. This is a clear break from their previous stance of overcharging for long distance phone calls, and seeing VoIP as a threat to their profits. This is not to say that they will allow Skype, Vonage or other 3rd party VoIP providers, but more likely that they would each implement their own branded in-house VoIP networks.