<?php
  /*
  Plugin Name: Del.icio.us Category Links
  Plugin URI: http://wordpress.org/#
  Description: Takes your post categories and creates a list of links to matching tag pages at del.icio.us.
  Author: Your Name
  Version: 1.0
  Author URI: http://www.yourwebsite.com/
  */
  
  //your del.icio.us username
  $delicious\_username\; =\; \text{'}username\text{'};\; //append\; to\; the\; post\; text\; the\; links\; to\; del.icio.us\; function\; add\_links($post_text) {
      global $delicious\_username;\; //setup\; the\; delicious\_links\; variable$delicious_links = "<p class=\"meta\">More at my del.icio.us: ";
      //append links for each category
      foreach(get_the_category() as $cat)\; \{$delicious_links .= "<a href=\"http://del.icio.us/$delicious_username/$cat->cat_name\">$cat->cat\_name$</a> "; 
      }
      delicious_links .= "</p>";
      //return post text with delicious_links added
      return $post\_text.$delicious_links;
  }
  
  //action hook to handle post content
  add_action('the_content', 'add_links');
  
  ?>