But then it would be an optional update, for what has been shown as free Apple apps that come bundled on the iPhone and the buyable upgrade apps along with the OS for the Touch (though you can update your Touch for free through various ways).
Makes sure everyone is on the same page. There is some discussion on another thread as to why you aren't able to hide or get rid of them (stock, weather etc) also. Apple could easily push small changes of their OS and apps without most noticing. E.g. - have you noticed the change in the Core animation of the waste paper basket in mail, when you delete a message, from June?