I made a school classifieds with a mish-mash of scripts, plugins, and a revamped classipress theme.
I also have a project that utilized widgets in the center of a theme, and there were icons that represented different sidebars. When you clicked on on icon, the widget would slide. It had a great deal of trouble with IE ( which I am just driving myself into designing so it failed ). But was a pre-cursor to above.