After booking my first two flights, I see a few things that would make booking more convenient:

• Store credit card information in the profile
  • saves time, especially with business cards having different billing addresses
  • can be more secure if one doesn't have to type in the CC number by hand every time and potentially expose it to prying eyes
• Store TSA information
  • saves time typing information
  • saves some from having to look up things like redress numbers
• Store additional e-mail addresses for sending copies of itineraries
  • all of my business bookings have to get copied to others
• Store additional people in my profile
  • Including ER number, TSA info, seating preferences, etc.

I'll add a "me too" to some of the other thoughts, like:

• Change seat assignments
• Change/cancel/rebook itineraries
• Missing flight credit requests
• Remembering entries made in previous screens (read: changing flight search options, etc.)
• Knope's list of Functionality Requiring Policy Changes

-btr