Anyway, in my quest, on-line as well, I have found some really great resources. Here you can find all sorts of resources for playing those old favorites, even if you don't have that machine anymore. It's just a click, no need to fill anything out. Come visit the PCWize forum and live chat. You can discuss anything computer related and it's a good place to get help with any computer questions you may have.
Some people have programs installed that rotates their wallpaper every so often.
Some people should have better things to do with their time. Here's a program that'll take care of all that mundane stuff so you do have time for other things. Webshots is an on-line repository of pictures you can grab for use on your desktop, but now they've got a cool little program that'll grab new images from their site and change your wallpaper out for you. This site archives real court documents concerning famous people. To give you an idea, take a look at Puff Daddy's latest and greatest.