I need some advice from developers that have built iPhone apps using either Amazon Web Services or Google App Engine as the backend. My app is quiz based with the user downloading content from the server...but I don't know which cloud based server to choose!! Is Google App Engine better or one of the products from the Amazon Web Services suite? If so, which Amazon based server would I need? I'll be hiring an external developer to build the app but was hoping for some impartial advice from forum users.... Thanks!