I StumbledUpon a notable Ajax resource recently, called Ajaxload. This site provides tools for generating an animated GIF that can be used on your site to indicate that something is loading or happening or whatever. Choose a style you like, the background color, the foreground color, and the transparency of the background, then click “Generate it!” and you have a nice, custom graphic. The site’s in beta now and is free; I’m not sure if it’ll remain so or not (hopefully it will).