Well, I’ve upgraded to WordPress 1.5. I was pointed to a HowTo, which went through the steps in gory detail. But it turns out that, if you don’t care a whit about design, the upgrade is even simpler.
mv wordpress wordpress_bak
tar -vzxf /tmp/wordpress-latest.tar.gz ./
Edit database settings in wp-config.php. Then go to http://servername/wordpress/wp-admin/upgrade.php and click on the link.
That’s literally all there is to it.
That’s awesome. I love WordPress.