Hovering over a link to find an ID does not seem particularly intuitive to me.

The first thing I did when I installed WordPress was to start hacking up the default theme. I knew nothing of PHP, 'template tags' or any of that stuff. However I did quickly learn that I needed to know page ID's to make use of wp_list_pages(). WordPress is designed with theming in mind, so not providing the necessary information for new users to do this easily seems a little silly to me. I started using ID's back when they were readily available in the admin panel, but I assume it would have had me baffled for a few minutes if I'd started with 2.5+.