On this day, I learned how to update Wordpress when you have changed domain names, but still have the same file structure.

First, edit wp-config.php to have these lines BETWEEN the <?php and ?> tags:
define('WP_HOME','new domain's path to WP');
define('WP_SITEURL','new domain's path to WP');
and log into Wordpress.

Then, navigate to the Settings/General page in the Administration site. There should be two greyed out boxes with the name you put into the above code. Return to wp-config.php and delete or comment out the two lines you added. Refresh the General Settings page and then put the names there.

Pretty nifty voodo, I know. Now to update to WP 2.9.