Symphony.

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:fb="http://ogp.me/ns/fb#"
    exclude-result-prefixes="fb"
    version="1.0">

    <!-- 
        Name: Facebook Comment Utility
        Version: 1.0
        Author: James Sidhu <james.thomas.sidhu@gmail.com>
        
		Credits to Brian Zerangue <brian.zerangue@gmail.com> for the Facebook Like Utility which this utility is based on.

        //How to use 
        <xsl:call-template name="fb-comments">
          <xsl:with-param name="url" select="'http://site.com'"/>
        </xsl:call-template>

		//Required 
		<xsl:param name="url"/>

		//Optional 
        <xsl:param name="num_posts" select="2"/>
        <xsl:param name="width" select="500"/>
        <xsl:param name="color_scheme" select="'light'"/> Options: light/dark
		<xsl:param name="type" select="'html5'"/> Options: html5/xfbml
		
    -->
        
    <xsl:template name="fb-comments">
        <xsl:param name="url"/><!-- Required -->
        <xsl:param name="num_posts" select="2"/>
        <xsl:param name="width" select="500"/>
        <xsl:param name="color_scheme" select="'light'"/>
		<xsl:param name="implementation" select="'html5'"/>

        <div id="fb-root"></div>
		<script>
			(function(d, s, id) {
			  var js, fjs = d.getElementsByTagName(s)[0];
			  if (d.getElementById(id)) {return;}
			  js = d.createElement(s); js.id = id;
			  js.src = "//connect.facebook.net/en_US/all.js#xfbml=1";
			  fjs.parentNode.insertBefore(js, fjs);
			}(document, 'script', 'facebook-jssdk'));
		</script>
        <xsl:if test="$implementation='html5'">
            <div class="fb-comments" data-href="{$url}" data-num-posts="{$num_posts}" width="{$width}">
                <xsl:attribute name="colorscheme">
                    <xsl:value-of select="$color_scheme"/>
                </xsl:attribute>
            </div>  
        </xsl:if>
        <xsl:if test="$implementation='xfbml'">
            <fb:comments 
				href="{$url}" 
				num_posts="{$num_posts}" 
				width="{$width}" 
			>
		        <xsl:attribute name="colorscheme">
		            <xsl:value-of select="$color_scheme"/>
		        </xsl:attribute>
            </fb:comments> 
        </xsl:if>
    </xsl:template>
</xsl:stylesheet>