Does one exist? I know there is one that notifies you while you're still in the app, but you don't know how many times I have exited the messaging app, went to do something else, come to find hours later that my text never sent (I don't really pay attention to Messages app icon to check for the exclamation point) A local push notification wouldn't be a bad idea to let you know that you message never sent. Am I the only one who has this issue? Is something like this doable?