Let's say you want to write a simple ticketing web application. It won't have a lot of features, but hey, you don't need all the bells and whistles. One critical feature that it will need to support, however, is the ability to accept emails and input them into the system as a new ticket. Oh yeah, and imap and pop3 are not an option because IT refuses to do anything helpful... ever. So you are relagated to dealing with Exchange Web Services.
I had an idea to create a social network (similar to Facebook) for just my family.