if you look at the plugin code, you’ll see the following declaration of the ‘delicious’ function.
delicious($username, $count=15, $extended="title", $divclass="delPost", $aclass="delLink", $tags="yes", $tagclass="delTag", $tagsep="/", $tagsepclass="delTagSep", $bullet="", $rssbutton="no", $extendeddiv="no", $extendedclass="")
call the function, delicious($username), where you want the output to display.
replace $username with your del.icio.us user name.