Just curious as to what featured image does and how it is different than any other image uploaded to the media gallery.
The way I always thought it would have worked (I'm starting to use WP more, really looking at all the features and getting into how they operate) was that an image could be designated as featured image and a widget or area could be set to show a slideshow of any images marked as such without having to manually add images to the slideshow. The way it seems to work, as far as I can tell, is the exact same (actually less conveniently) as uploading an image and inserting it into a post.
Can someone explain featured images? How are they different than any normal image?