Showing authentication or some user management on iOS without packaging the application key would be useful. (In fact you best hide your application key from this blog post.)
Thanks Andy. I agree that showing some authentication and even push notification in a future post is worthwhile. Those technologies require a bit more plumbing than what I have already shown. The portal will offer direct support for Authentication and Push notification for both ios and android. I think I am going to wait and see how this works out before commenting on those extra technologies.
Regarding the application key, I was aware that I was letting out the keys to the kingdom. I have regenerated them so everything should be OK.