I just finished a Drupal theming project. I rode a steep learning curve but I can dig Drupal now. Styling with css. Custom PHP. Custom nodes and blocks. Pretty cool! I do not think Drupal will steal me away from WordPress for blogging but it may steer me toward using it as a CMS platform for business website applications for businesses that want to have regular updates (ala blogging) and more interaction with their customers (ala forums).