Swap Thematic Meta Data to be on top of Title.

gistfile1.php

function childtheme_override_postheader() {
    global $post;

    if ( is_404() || $post->post_type == 'page') {
       $postheader = thematic_postheader_posttitle();
    } else {
       $postheader = thematic_postheader_postmeta() . thematic_postheader_posttitle();
    }

    echo apply_filters( 'thematic_postheader', $postheader ); // Filter to override default post header
}