Well, update to say I got this almost solved. I edited the footer.php file to this:
<div id="footer">
Powered by <span id="generator-link"><a href="http://wordpress.org/" title="<?php _e( 'WordPress', 'Sandbox.' ) ?> " rel="generator"><?php _e( ' WordPress', 'Sandbox.' ) ?></a></span> &
<span id="theme-link"><a href="http://www.plaintxt.org/themes/sandbox/" title="<?php _e( 'Sandbox', 'Sandbox.' ) ?>" & rel="designer"><?php _e( 'Sandbox.', 'Sandbox.' ) ?></a></span>
<div id="footer">
(ɔ) obsoletist.
</div><!-- #footer -->
</div><!-- #wrapper .hfeed -->
<?php wp_footer() ?>
</body>
</html>
That got what I wanted on two lines, both right-justified. I’m still trying to figure out how to left-justify one part & right-justify the other all on one line. Just in case anyone’s interested. 😉