Five months after announcing an ambitious plan to expand its high-speed data network nationally, Verizon Communications reported that 150 of the company's largest business customers have signed contracts for advanced services provided over the network. In the first phase of the expansion, Verizon built out infrastructure throughout the Northeastern US, specifically to connect states such as New York, Massachusetts and Pennsylvania, among others. In Q1, Verizon added long-distance connections in the Northeast for its Regional Frame Relay, SONET...