I noticed the website http://gawker.com/ does something cool with images in posts - some posts have a large featured image above the title, others have none and just have images in the content.
My best bet on how to achieve this in WordPress is to add
<?php the_post_thumbnail('large'); ?> above the title and make a selectable option to display or not display the_post thumbnail in the post edit screen. It would need to only apply to the post (and not the excerpt)... I'm not sure how I would create that option. I would appreciate if anybody knows how this would be done, can direct me to a somewhat relevant tutorial, or has a better idea of how to achieve this.