Posting to toot my own horn, but this might help someone.
My site sells fabric and the search results were only returning the short teaser text and a link to the product. Great if you already knew what you were looking for, but not so helpful if you were unsure. Who wants to click back and forth a bunch just to see it's not what you're looking for?
Now I know there are other ways of doing this, so I expect some better examples to follow. Until then, you can add a very short amount of code to the search-result.tpl.php from the search module folder and then put the new file in your template folder to override the Drupal default results. This was done on a D6.15 & U2.2 install.
Find, copy and open 'search-result-tpl.php' NOT 'search-results.tpl.php', and after all the commented text and the closing php tag paste you want this code in there.
<a href="<?php print $url; ?>"><img src="/sites/default/files/imagecache/product_list/<?php print $result['node']->field_image_cache['filepath']; ?>"/>
<a href="<?php print $url; ?>"><?php print $title; ?></a>
<?php if ($snippet) : ?>
<p class="search-snippet"><?php print $snippet; ?></p>
<?php endif; ?>
<?php if ($info) : ?>
<p class="search-info"><?php print $info; ?></p>
<?php endif; ?>
My file had nothing but the default code so I just pasted all the above, replacing what was already there. If you already have customized this file then you probably know a lot more than I do so maybe just add the necessary line below.
The part that gave me the images, and in this case I'm using the product_list images under the imagecache folder, is this line here:
<a href="<?php print $url; ?>"><img src="/sites/default/files/imagecache/product_list/<?php print $result['node']->field_image_cache['filepath']; ?>"/></a><br>
I haven't done any extra themeing other than the break tag so that my image sits above the title and text, as: 1. I don't know how to make things look nice very well and 2. this fits my needs as I wanted simple small images, and now I have them.
Obviously this is a very basic approach, and it currently only displays the main product image, but it does make the search results much more usable for my situation. I'd like to thank everyone that ever asked this or a similar question on either the Ubercart or the Drupal forums as I probably read your post and every response to it until I worked this out.