I've seen that Drupal 6 has a really poor set of themes compared to, for example, WordPress. Do you know good resources/links for converting WP themes to D6?
The book Front End Drupal: Designing, Theming, Scripting includes a few pages that do a very good job of explaining the basics of converting a Wordpress themes to Drupal 6 themes.
Alternatively, the following links may also help: