American Airlines has just signed a deal with AirCell, to offer in-air broadband access. The tests will begin in 2008, initially on transcontinental flights, but if all goes well, then WiFi could be offered in domestic flights.
I wonder if other airlines are paying attention. WiFi availability is a crucial decision in what cafe I patronize, and similarly I am careful in picking hotels while traveling. In the future, WiFi might become a deciding factor when it comes to picking airlines. American Airlines is not my favorite airline but their WiFi offer would make me consider them before United Airlines, despite all the frequent flyer miles I have with UA.