Well, I've seen "latest photos" set to show random images. So with the Ajax stuff it would just load 4 or 5 new random images without reloading the entire page. There was a little "more" link at the bottom of the random images that, when click, would just load new random thumbnails.
If I knew anything about current HTML I guess I could add it, but I'm a Soldier so HTML is not my thing, lawl.