Drupal's phptemplate is the most powerful, simple, and flexible templating/theming system on the planet*. Yet, it seems that the majority of drupal themers, (and wannabe drupal themers) are ignorant of its true power.
More disturbingly, vast numbers of people still insist that Joomla!, typo3, and wordpress's templating systems are easier, sexier, and slicker. These people are either loony, or wrong.
As an expert in PHPtemplate (isn't that scary), I've decided its my duty to show the true power of PHPtemplate to world.
Consider these tutorials, a proper (and steadily growing) introduction to drupal's templating system.