BindingExtensions.cs

public static class BindingExtensions
{
    public static MvcHtmlString Script(this HtmlHelper helper, string innerHtml, Dictionary<string, object> attributes)
    {
        if (!System.Diagnostics.Debugger.IsAttached)
            innerHtml = new Microsoft.Ajax.Utilities.Minifier().MinifyJavaScript(innerHtml);

        var builder = new TagBuilder("script");
        builder.MergeAttributes(attributes);
        builder.InnerHtml = innerHtml;

        return MvcHtmlString.Create(builder.ToString());
    }

    public static MvcHtmlString Style(this HtmlHelper helper, string innerHtml, Dictionary<string, object> attributes)
    {
        if (!System.Diagnostics.Debugger.IsAttached)
            innerHtml = new Microsoft.Ajax.Utilities.Minifier().MinifyStyleSheet(innerHtml);

        var builder = new TagBuilder("style");
        builder.MergeAttributes(attributes);
        builder.InnerHtml = innerHtml;

        return MvcHtmlString.Create(builder.ToString());
    }
}

bindings.spark.xml

<bindings>
  <element name="style">Html.Style('child::*', new System.Collections.Generic.Dictionary&lt;string,object&gt;{{'@*'}})</element>
  <element name="script">Html.Script('child::*', new System.Collections.Generic.Dictionary&lt;string,object&gt;{{'@*'}})</element>
</bindings>

example.min.html

<style type="text/css">#dashboard{margin:1em;padding:1em;border:1px solid #222}</style>

<script type="text/javascript">$(function(){$("#dashboard").load("/Test/Dashboard")})</script>

example.spark.html

<content:head>
    <style type="text/css" cache.expires="1200" cache="System.Diagnostics.Debugger.IsAttached">
        #dashboard 
        {
            margin: 1em;
            padding: 1em;
            border: 1px solid #222;
        }
    </style>
</content:head>

<content:scripts>
    <script if="bool.Parse('false')" src="/Scripts/jquery-1.4.2.min.js" type="text/javascript"></script>

    <script type="text/javascript" cache.expires="1200" cache="System.Diagnostics.Debugger.IsAttached">
        $(function () {
            // We don't need no stinkin' comments
            $("#dashboard").load("!{Url.Action(MVC.Test.Dashboard())}");
        });
    </script>
</content:scripts>