With the increased excitement surrounding AJAX and all the associated frameworks, jQuery, mootools etc.., the web has become a great place to live. Just discovered over at CSSRemix, Discover Tennessee Trails showcases one of the newer applications of jQuery, Parallax Effect. This allows a background image, or anything else for that matter, to move at a different pace than the web page . The differences in tempo of motion creates a wonderful illusion of depth to the site.
Here are some other examples of this Parallax Effect in action: