Only works well on lighter colored forums.
Stick this in your Header:
If you decide to use it longer please grab the "bug" upload it to your own Photobucket acct and replace the link.
It'll add this little bug up near the top of your forum, across from the login area

<style type="text/css">
div#bug {
position: fixed;
top: 230px;
right: 18%;
height: 75px;
width: 56px;
background: url(http://i102.photobucket.com/albums/m105/mysmileyplace/bug.gif);
background-repeat: no-repeat;
}
</style>
<div id="bug" ><span></span></div>