WoW Progression Widget for Wordpress
I have ported the Drupal module of the Word of Warcraft Progression block to be a Wordpress widget.
You can download the file from here. I haven't tested it extensively but selecting the bosses and zones on Settings screen affects the front end and the jQuery code to appears expand and collapse the zones appears to work. So as far as I am concerned it works with Wordpress 3.0.1 but may not work with lesser versions (judging by the Wordpress Codex/API it should work for Wordpress 2.7 onwards.)