Drupal Travel is a XHTML & CSS based clean Drupal Theme with five regions (content top, sidebar, content, content top and footer). Valid XHTML and CSS. It is blue like Drupal.
The theme is developed by Azri Design.
Update: The Drupal 7 version is here! It's an HTML5/CSS3 theme.
* Site name
* Site slogan
* Primary links
* Comment user pictures
* Sidebar, Content Top, Content Bottom, Footer
See it in action: