If they can combine this ease of accessibility for developers with a security model on the end-user side, I think it can be a solid win.
I'd love to see granularity in what the API can access, for example, TripIt may request something like "Grant access to emails from the domain travelocity.com, usairways.com, etc.," and I can know with confidence that they will not have access to the rest of my inbox.
I'd love to see granularity in what the API can access, for example, TripIt may request something like "Grant access to emails from the domain travelocity.com, usairways.com, etc.," and I can know with confidence that they will not have access to the rest of my inbox.