In the last couple of months there has been a growing effort to standardize the icon for RSS/ATOM feeds in browsers. Back in December, the Internet Explorer developers pledged to adapt the icon first implemented in Firefox. You can download a pre-packaged collection of this icon in various sizes, and file formats from FeedIcons.com. I would encourage all web developers on campus to use this icon if you plan on representing your syndication feeds graphically in your work.