Many sites have an icon that shows up in the URL of the browser such as google or ebay. It is a really simple task to do it.
You create a .ico file and name it favicon.ico and put it in your website root directory. The required dimensions of the icon have to be 16x16. Browsers automatically look for it and load it.
I've created a "C' icon located here:
http://peterro.com/ico/It's an icon that sort of matches the C in the header of the site. Rename it as above and it'll show up.
Just a thought.