For most of the history of commercial flight, the time spent in the air by business people was lost productivity. There was no access in the air to corporate networks and the Internet severely limiting what people could work on while flying.
Thankfully the limitations on working in the air are diminishing every day thanks to services like the Gogo in-flight internet that turned one back in August. The service offers internet connectivity during flights to let people surf the net and work.
Continental Airlines announced that starting in Q2 2010 it would be fitting its 21 Boeing 757-300 aircraft with the Gogo service. The fleet of 21 aircraft primarily serves domestic routes. The Internet access will be offered to passengers at $4.95 and up depending on the length of the flight.