Nearly a year to the day after we heard that WiFi trials were beginning on some of the San Francisco Bay Area Rapid Transit trains, WiFi Rail has announced a deal that’ll last a score and provide high-speed WiFi “throughout the BART transit system and on all BART commuter trains.” Reportedly, the network has successfully been tested to handle loads and provide speeds in excess of 15Mbps on trains moving 81 miles-per-hour. As it stands, four downtown San Francisco stations and some segments of the tunnels are already fully functional, but it’ll take until the end of 2010 before the entire network is complete. There’s no mention of what the price table will end up looking like, though we are told that subscriptions will be available by day, month or year. Now, if only this would filter out to every other mass transit entity in America, we’d be just jolly.