actually this is just a small portion w/ the IT direction of US Airways. First, the website compared to USAirways old site is a disaster. I have people complaining all the time about the "new" us site. the new us site is a 1995 or 2000 website design and navigation. The MAC question is a joke. If you use the right development and deployment environment it would work on MAC. I do use a MAC to book on US however I use firefox not safari to book on US.
There are complex issues with how IT is run and simple issues. For example, look at the new boarding pass who compared the US Boarding pass (large print, everything labeled, information printed once) compared to the new one (most things unlabeled, small print, information printed more than once). Who said WOW - this new boarding pass rocks!
Who did not think that fixing the ability to check luggage in at the airport via a kiosk was if you checked in on-line at home was an important fix. US was stressing to check in on-line only to get to the airport and have to stand in line to check luggage because you could not use a kiosk.
Many, many issues with IT at US. I firmly believe its not SHARES issue - its what you do with it. I buy alot of software and if I don't use in right in the business world my p/l suffers.