To be able to customize the looks of your nice WP-plugin 'AVH Amazon' easily by CSS, I would like to suggest some changes to the html of the widget.
Please remove the <br />'s and wrap the link and the description with an div.
The html suggested would look like this:
<div class="wishlistitem">
<div class="wishlistimage">
<span>
<a href="
http://www.amazon.com/..." title="title of the item" target="_blank">
<img width="160" height="160" alt="title of the item" src="item.jpg"/>
</a>
</span>
</div>
<div class="wishlistcaption">
<span>
title of the item
</span>
</div>
</div>
