A good Flash Designer will put alot of effort into a preloader, knowing that it may be viewed for sometime while the site loads in the background. Its eye candy to keep the viewer occupied during the times when content or data is being loaded in. Big Spaceship have put together a site to showcase and archive preloaders from websites past and present. Checkout the preloader museum and waste a bit of time watching loaders loading nothing, a collection of less than ordinary, pretty looking preloaders from websites old and new. Somewhat of a homage to the preloader. You can submit your own preloaders to pretty loaded aswell.