this is tripit: www.tripit.com.
I love it to pieces. I travel way too much (how this happens even with Sailor and the nieces and nephews on the same coast as me is beyond me) and I'm a secret information organization nerd. AND, they have very sweet customer service. I sent them a feature request and got a nice little note back from them. Awwwww. Anyway, if you fly too much too, try it out. Quite handy.
I still keep all my travel itinerary stuff in my little blue notebook, but now I just print off the agenda the night before and slap it on in, rather than writing out everything by hand.