At one gate at Continental Airlines' hub in Houston, the airline is testing out "self-boarding" for passengers. This is how USA Today explains it: "In self-boarding, passengers — much like customers of the New York City subway— swipe their boarding passes at a kiosk reader at the gate. That opens a turnstile or door to the jet-bridge. Although an agent isn't there to take the pass, one is typically present to handle problems and other customer service tasks." Just hope those boarding pass kiosk sensors don't get too dirty, okay? USA Today adds/warns, "The practice has been common at many foreign airports for several years. And if the rate of adoption abroad is any indication, self-boarding could soon proliferate here."