OTTAWA - Wireless phone customers in Canada numbered 19.3 million at the end of the third quarter of 2007, ended September 30, says the Canadian Wireless Telecommunications Association. In the third quarter of the year, wireless service providers (Bell Mobility, Telus, Rogers Wireless, Virgin Mobile, MTS, SaskTel, Videotron, etc.) reported the addition of approximately 523,000 new subscribers, “which marks the first time that net new customer additions exceeded a half-million subscribers outside of a fourth quarter,” noted the association. What that means is that now Canada's national wireless penetration rate has surpassed the 60% benchmark. And, recent CWTA research suggests...