Here's a use case: 1. I book a flight, and get a flight confirmation email from the airline. It includes a machine-readable version of my flight info in the me

Here's a use case: 1. I book a flight, and get a flight confirmation email from the airline. It includes a machine-readable version of my flight info in the metadata. 2. I press a button, and the flight gets added to Google Calendar, or a flight-status tracking app, or a shared travel calendar service for people who fly a lot. Note that this stuff doesn't need to be written by Google; it's an open format. Sound potentially useful?