This is just incredible.  DHS keeps all of this on you when you travel by plane.  Here’s just a bit of the blog post on philosecurity.org.

• Credit card number and expiration (really)
• IP address used to make web travel reservations
• Hotel information and itinerary
• Full Name, birth date and passport number
• Full airline itinerary, including flight numbers and seat numbers
• Cruise ship itinerary
• Phone numbers, incl. business, home & cell
• Every frequent flyer and hotel number associated with the subject, even ones not used for the specific reservation

Scary isn’t it?  Go read their blog for even more information.