Custom query with orderby meta_value of custom field

You can define the meta key for orderby parameter using the old method (I tested on WP 3.1.1)…

query_posts(
    array(  'post_type' => 'services',
            'order'     => 'ASC',
            'meta_key' => 'some_key',
            'orderby'   => 'meta_value', //or 'meta_value_num'
            'meta_query' => array(
                                array('key' => 'order_in_archive',
                                      'value' => 'some_value'
                                )
                            )
    )
);