Ditto. Those travel itinerary trackers look nice but aren't easily accessible when I'm standing at a hotel check-in or needing to put my code into an airline or train ticket kiosk.

I carry each reservation printed out in a simple folder file that stays in my day pack. A second copy of everything is kept in my main bag. Then a PDF copy is attached to a GMail message, and/or I have PDF's on whatever laptop or PDA device I'm traveling with.

A tad paranoid, but that information easily accessible from multiple locations is good insurance. So in that respect, I suppose a site like those listed above where you can add all that info to a nice, printable itinerary would have some benefit. But I like my way, it works for me. As I finish with one reservation, I rip it up and throw it away and then I've one less document to carry to the next stop.