My local library has a great service that you can enable when you borrow books: they will send you an email to notify you that your books will come due in 3 days. Great as long as you check your emails of course. Well, what about having an app that would notify me that my books are due? I could renew them right there on the spot. It could also add a reminder in my calendar.
Beyond the functionalities of the app, the interesting point is that such an app could be developed quickly if it could leverage an API exposing the services mentioned above. Both the web application and the web would use the same services.
Geoffroy's Weblog 