Image Bubbles is a cool Flash-like effect that causes an image to bubble up and expand whenever the mouse rolls over it from within a series of images. It's a nice way to draw attention to an image when the mouse rolls over it. For images with an "alt" attribute defined, the script will use it to render a nice tooltip that's shown above the enlarged image. Both the speed and magnification level of the image when it bubbles up can be customized. Cool!