In January, 2006 Southwest Airlines rolled out a new capability that many people are unaware of. You can now check in via your Palm or Windows mobile device.
Just visit http://mobile.southwest.com and there are options for Flight Check-in and Cancel Check-in. Selecting the option to check-in will allow you to claim that coveted A boarding pass, although you’ll still have to stop by a kiosk or see an agent at the airport to print the physical boarding pass.
Now, I just have one question. Why is it that all the other airlines don’t offer the same convenience?