Functions.php

// Area 8, located in the top. Empty by default.
    register_sidebar( array(
        'name' => __( 'Center Top Widget Area', 'twentyten' ),
        'id' => 'center-top-widget-area',
        'description' => __( 'The center top widget area', 'twentyten' ),
        'before_widget' => '<li id="%1$s" class="widget-container %2$s">',
        'after_widget' => '</li>',
        'before_title' => '<h3 class="widget-title">',
        'after_title' => '</h3>',
    ) );