A. Via DB
[…] The key to gaining access to the power of WordPress from an outside page lies in the wp-load.php file. This file loads the WordPress application and makes its API, and therefore your content, available for use. Once this file is included in a page on your site, you will be able to use any WordPress function just as if you were working in a WordPress template. […]
<?php
// Include WordPress
define('WP_USE_THEMES', false);
require('./wordpress/wp-load.php');
query_posts('showposts=1');
?>
—
http://www.corvidworks.com/articles/wordpress-content-on-other-pages
B. Via RSS Feed
Using “SimplePie” from http://simplepie.org/
—
http://www.corvidworks.com/articles/easy-feed-reading-with-simplepie
