Now customers traveling on American Airlines' Boeing 767-200 aircraft can access complete coast-to-coast coverage on nonstop flights between New York and San Francisco, New York and Los Angeles, and New York and Miami.
Some believe the move could create a new stream of revenue for the nation's biggest airline as the aviation industry faces high fuel prices and other challenges. It could, however, create new headaches as passengers retrieve sensitive e-mails and Web sites in confined quarters.
Passengers can use the service for $12.95 per flight of more than three hours.  Several other airlines have been testing or considering in-flight services. 
The system will block Internet-based phone calls, giving passengers relief from chatty seatmates however American and other U.S. airlines have said they will not filter sites based on their content, raising the prospect of passengers surfing pornography with kids nearby. Airlines say they already have general policies to address unruly passengers, and those would apply as they do now to passengers who browse adult magazines.