El Bucle de Wordpress (The Loop)

The Loop, en Wordpress.org:
http://codex.wordpress.org/The_Loop

Guía interesante:
http://www.themelab.com/2008/04/04/the-ultimate-guide-to-the-wordpress-loop/

Más tutoriales sobre WP en ThemeLab:
http://www.themelab.com/wordpress-tutorials/

Tu propio Loop usando WP_Query:
http://weblogtoolscollection.com/archives/2008/04/13/define-your-own-wordpress-loop-using-wp_query/