I apologise for confusion, it was early in the morning and I eventually gave up. Let's see if it makes more sense now...
The file itself looks like this:
<div id="share">
<ul>
<li><a href="javascript:window.external.AddFavorite('<?php bloginfo('name'); ?>',%20'<?php bloginfo('name'); ?>')"><img src="<?php bloginfo('template_directory'); ?>/images/icons/heart.png" alt=""/></a></li>
<li><a href="http://www.facebook.com/share.php?u=<?php the_permalink();?>" onclick="return fbs_click()" target="_blank"><img src="<?php bloginfo('template_directory'); ?>/images/icons/facebook.png" alt=""/></a> </li>
<li><a title="Stumble it!" href="http://www.stumbleupon.com/submit?url=<?php the_permalink(); ?>"><img src="<?php bloginfo('template_directory'); ?>/images/icons/stumbleupon.png" alt=""/></a></li>
<li><a title="Add To Google Bookmark!" href="http://www.google.com/bookmarks/mark?op=edit&output=popup&bkmk=<?php the_permalink();?>&title=<?php the_title(); ?>"><img src="<?php bloginfo('template_directory'); ?>/images/icons/google.png" alt=""/></a></li>
<li><a title="Digg it!" href="http://digg.com/submit?phase=2&url= <?php the_permalink();?>&title=<?php the_title();?>"><img src="<?php bloginfo('template_directory'); ?>/images/icons/digg.png"alt=""/></a></li>
<li><a href="http://del.icio.us/post?v=4&noui&jump=close&url=<?php the_permalink();?>&title=<?php the_title();?>"><img src="<?php bloginfo('template_directory'); ?>/images/icons/delicious.png"alt=""/></a></li>
<li><a href="http://technorati.com/faves?add=<?php the_permalink();?>"><img src="<?php bloginfo('template_directory'); ?>/images/icons/technorati.png" alt=""/></a></li>
</ul>
<a href="http://twitter.com/share" class="twitter-share-button" data-count="horizontal" data-via="<?php echo $funkyblog_twitter;?>">Tweet</a><script type="text/javascript" src="http://platform.twitter.com/widgets.js"></script><br />
</div>
<div class="clear"> </div
>
And technically, I assume it IS a template part, but a template part that I made myself.
The function that calls it, at this point, looks like this:
<!-- Social Networking Bookmarks -->
<?php $show_social = get_option('funkyblog_show_social'); ?>
<?php if ($show_social=='true') : ?><?php include (TEMPLATEPATH . '/inc/social.php'); ?>
<?php endif; ?>
<!-- END Social Networking Bookmarks -->
So, the file is called only if the option to show the author biography is true. It works the way it is now, but I read about file inclusion on the Codex and it said that one should not use them that way, "unless they absolutely have to", which made me puzzled.
I would just like the theme to meet all standards and I'm a designer, not a programmer.
It cannot be a widget as it appears right behind the loop, on the single Post/Page view. Otherwise, I would've packed it as a widget. :)