My latest WordPress article has been published at Peachpit: Web Design Reference Guide: Customizing WordPress: Pages and Posts:
While posts make the blog, pages can transform your WordPress site into a full-fledged content management system. This article explains how to use some fundamental features of posts and pages in WordPress.
…WordPress gives you so much power over pages that some people use WordPress not for blogging, but rather to create content management systems (CMS).
The next article should appear in about a month.