Google Alerts From Reading My Email: Next Step, Calendar Integration?
I was looking at a Google search result and I saw this alert pop up, regarding a flight:

I clicked on it and saw a second search page, where the search query was ‘My Flights’, and this popped to the top:

And the link to the confirmation email — from which the information had been pulled — was offered up.
So, I can see that Google could build a search-based competitor to TripIt relatively easy. Instead of having to forward travel confirmations from airlines, hotels, etc. to TripIt, Google could simply index them in a smart way. And Google could correlate trips with travel dates on my Google calendar. So imagine if I had a trip to Southern California on calendar as a multiday event, Google could have pulled hotel and other information together with the two flights there and back, and used the name of the event as a tag, or folder, and the calendar event could have collated all the travel information together automatically.
Look out, TripIt!

