I guess Im just used to the end key bringing you back to the home screen/standby screen w/o closing programs. I don't mind pressing the Menu button, but having to press it twice
Oh well, not the end of the world. By the way, it is smart enough, I've noticed, not to exit most of the time when you're in a middle of typing something, like creating a new contact/appointment/todo/note, setting alarm, or being in a settings menu of a program.