AT&T last week unveiled a high-speed data service to deliver high-bandwidth data to branch offices. The service, called AT&T Ethernet Switched Service-Metropolitan Area Network, uses multiple-access suppliers to connect the various offices of a business across a VPN. Businesses can expect to connect their local area networks at speeds between 50 Mbps and 1 Gbps. The service also and features a self-healing option that can provide continuous access to critical applications. It's available now in 67 metropolitan areas and 90 cities across the United States.