Mastering WordPress Shortcodes | Developer's Toolbox | Smashing Magazine
http://www.smashingmagazine.com/2009/02/02/mastering-wordpress-shortcodes/
10 incredibly cool WordPress shortcodes
http://www.catswhocode.com/blog/10-incredibly-cool-wordpress-shortcodes
How to use, style and implement Wordpress shortcodes | TutToaster
http://www.tuttoaster.com/how-to-use-style-and-implement-wordpress-shortcodes/

WordPress shortcode API is a powerful function which was introduced from version 2.5, it’s just a simple set of functions for creating macro codes in post content. If you’ve developed a Vbulletin forum before, you would have been familiar with the shortcode (something called BBCode) but the WordPress users maybe not. In this article, I would like to show you how to create and use shortcodes, in addition, I will show you some creative examples of using shortcode in WordPress blog.

WordPress shortcode API is a powerful function which was introduced from version 2.5, it’s just a simple set of functions for creating macro codes in post content.