var picture = new Image();
picture.src = 'http://www.picpix.com/youngoat/pic/00001bc2';
I was thinking it might be cool for layouts to be able to use this to preload the next (and possibly previous) pictures when you're viewing the "single image" page. Then when you move on to the next image, it will already be in the browser cache and therefore load instantly. So I guess I'm suggesting that a couple properties (next_image_url, prev_image_url) be added to whatever s2 class is responsible for the single image view... That is, if people are interested in the idea... =]
I stole this idea from Windows XP's integrated picture viewer by the way. It seems to start loading the next picture before you click next.