Kindle Screensaver - It needs to display the book cover

I really don't understand why, when I turn the Kindle off, it doesn't display the cover of the book I'm currently reading.  It would help it seem more like a real book (whenever you looked at it, you'd say, wow I can't wait to start reading "Book Title" again...), instead of a strange screensaver, that sometimes I like (showing pictures of authors I read who are smiling) and sometimes I don't like (creepy pictures of Emily Dickinson, Virginia Woolf and other authors who have committed suicide).  What's the deal Amazon?  This is Kindle3 and it still doesn't display the book cover?  Just seems silly.