Drupal Videos and Drupal Themes portal
CSS grids are amazing tools for building websites that take alot of the tedius work out of laying out pages and content on your website.
Building awesome taxonomy pages using CCK,Views and template override.
Views theming and enhanced performance using variables just like theming nodes.
Chapter 2 from Lullabot video Advanced Theming for Drupal: Overview of Template.php
This screencast shows you how to use and configure the GMap and Location modules with Drupal 6.
Drupal 6 Themers who are just beginning may come across a few features that they don't realize can be controled in the Theme settings.
Bending Zen - Subthemes is the second video from my Bending Zen Series. This shows you how to quickly set up a subtheme using Zen as your base theme in Drupal 6.
The Zen Theme is a powerful theme that is created to be a starting point for new themers.