If you’d like to have a Digg button on your WordPress website all you need to do is load your single.php  file and add the following code in the Loop.

<script type=“text/javascript”>  
digg_url = ‘<?php the_permalink() ?>’;  
digg_title = ‘<?php the_title() ?>’;  
</script>
<script src=“http://digg.com/tools/diggthis.js” type=“text/javascript”></script>  

If you don’t like the thought of mucking around in your code, you can also download a plugin to take care of it. Before you go getting too popular though, take a look at how to speed up your WordPress website or How to Diggproof your blog.