The Well-Mannered Traveler, Harriet Baskas, gives an overview and some insight into in-flight Internet: Baskas provides a comprehensive listing of what airlines have free deals, and which flights (if particular ones are involved) are covered. This includes AirTran's Baltimore-to-Boston route, which the airline told Baskas was a competitive advantage. I suspect that Acela is a competitor on that route, among other airlines. (Acela will gain Wi-Fi in about six months.)
MSNBC Examines Free In-Flight Wi-FiFree Energy hit UK this week