The Extended Live Archives Plugin does not work with WordPress 3.0, opposed to the plugin page. I still like this plugin as seen here, so here is my solution:
- Download the archive
- Open includes/af-extended-live-archive.js.php and includes/af-ela.php in your favorite editor
- Replace in both files
require('../../../../wp-blog-header.php');
with
require_once('../../../../wp-config.php'); $wp_did_header = true; $wp->init();
and you’re good to go.
If anyone has a better idea, please write a comment.