I modified an image from The Brian Alvery Weblog and am releasing it for use in supporting the victims of Hurricane Katrina:
Feel free to add this code to your site as well (hotlinking is ok):
<script type="text/javascript">
<!--
document.write('<div style="position: absolute; left: 100%; top: 0px; overflow: visible; height: 120px; width: 120px; margin: 0 0 0 -120px; padding: 0; z-index: 9999; border: none; float: none;"><img src="http://www.uweb.ucsb.edu/%7Eliam/i/dri.gif" width="120" height="120" border="0" usemap="#rc"></div><map name="rc"><area shape="poly" coords="0,0,120,0,120,120" href="https://www.directrelief.org"></map>');
// -->
You can see it in use at my weblog.