I just modified the blank sidebox template - thanks for that. I used just an image which is a link. There is a lot of empty space over it though, which confuses me as the sidebox below doesn't have that. Here is the source code for my side box - anything obvious for why there is empty space above the image?

Code:
<!--// bof: mysidebox //-->
<div class="rightBoxContainer" id="mysidebox" style="width: 151px">
<h3 class="rightBoxHeading" id="nmysideboxHeading">Stuff</h3>

<div id="mysideboxContent" class="sideBoxContent"><p><div style="text-align: center;"><a target="_blank" href="http://link/"><img
 alt="stuff"
 title="stuff"
 src="http://www.thingy.com/foo.gif""></a><br>
</p></div></div>
<!--// eof: mysidebox //-->