I’m not running it here (only because I’m too lazy), but I was happy to find Arne Brachold’s Del.icio.us – Bookmark this! WordPress Plugin. It puts a sweet Bookmark on del.icio.us link whereever you call this function:
<?php dbt_getLinkTag(“Bookmark on del.icio.us”); ?>
Arne also wrote the Google sitemap plugin I use (though it turns out I’m a few versions behind).