Google Plus one (+1) on WordPress Theme

Here’s one for the web developers of the world.
Google plus one went live today, so I chucked together a couple of simple functions, to include in your WordPress functions.php theme file.

function ne_addGooglePLusOneHeader() {
    echo "<script type=\"text/javascript\" src=\"http://apis.google.com/js/plusone.js\"></script>\n";
}    

add_action('wp_head', 'ne_addGooglePLusOneHeader');

function ne_show_googleplusone_button {
    // display Google plus one (+1) at the bottom of the_content()
    global $wp_query;

    //set the size of the button: small, medium, standard, tall
    // (more info here: http://code.google.com/apis/+1button/#script-parameters)
    $size = "medium";

    $postUrl = get_permalink($wp_query->post->ID);
    $plusOneButton = "<g:plusone size=\"$size\" count=\"true\" href=\"$postUrl\"></g:plusone>\n";
    return $content.$plusOneButton;

}

add_filter('the_content', 'ne_show_googleplusone_button');