Thematic Widget above header.

gistfile1.php

// reference http://thematictheme.com/forums/topic/add-custom-widget-area-to-top-of-website/

// add a widget to the top of the site
function childtheme_add_thematic_aboveheader_widget($content) {
    $content['Top of site widget'] = array(
        'admin_menu_order' => 232,
        'args' => array (
        'name' => 'Top Of Site Widget (Twitter)',
        'id' => 'tweets',
        'description' => __('The widget area above the subs/footer.', 'thematic'),
        'before_widget' => thematic_before_widget(),
        'after_widget' => thematic_after_widget(),
        'before_title' => thematic_before_title(),
        'after_title' => thematic_after_title(),
    ),
    'action_hook' => 'thematic_aboveheader',
    'function' => 'childtheme_above_footer_aside_widget4',
    'priority' => 1
    );
    return $content;
}
add_filter('thematic_widgetized_areas', 'childtheme_add_thematic_aboveheader_widget');

// set structure for the aside widget above the footer
function childtheme_above_footer_aside_widget4() {
    if ( is_active_sidebar('tweets') ) {
        echo "\n".'<div id="tweets">' . "\n" . "\t" . '<ul>' . "\n";
        dynamic_sidebar('tweets');
        echo "\n" . "\t" . '</ul>' ."\n" . '</div>' . "\n";
    }
}