Updated (Working) More Type for Thematic

//change where theme uses excerpts
function childtheme_content($content) {
    if (is_home() || is_archive()) {
        $content= 'more';
    }
    return $content;
}
add_filter('thematic_content', 'childtheme_content');


function childtheme_excerpts($content) {
    global $thematic_content_length, $post;

        if ( strtolower($thematic_content_length) == 'more' ) {

            if ( preg_match('/<!--more(.*?)?-->/', $post->post_content ) ) {
                $content = get_the_content(more_text());
                $content = apply_filters('the_content', $content);
                $content = str_replace(']]>', ']]&gt;', $content);

            } else {
                $content = '';
                $content .= get_the_excerpt();
                $content = apply_filters('the_excerpt',$content);
                if ( apply_filters( 'thematic_post_thumbs', TRUE) ) {
                    $content_title = get_the_title();
                    $size = apply_filters( 'thematic_post_thumb_size' , array(100,100) );
                    $attr = apply_filters( 'thematic_post_thumb_attr', array('title'    => 'Permalink to ' . $post_title) );
                    if ( has_post_thumbnail() ) {
                        $content = '<a class="entry-thumb" href="' . get_permalink() . '" title="Permalink to ' . get_the_title() . '" >' . get_the_post_thumbnail(get_the_ID(), $size, $attr) . '</a>' . $content;
                    }
                }
            }


        }

    return $content;

}

add_filter('thematic_post', 'childtheme_excerpts');