The IBM Internet Technology Group has been publishing a fantastic series of articles about Drupal:

Using open source software to design, develop, and deploy a collaborative Web site.

Particularly exciting is the new support for IBM DB2 (see Part 9).

• Part 1: Introduction and overview
• Part 2: Design for an effective user experience
• Part 3: Building your development environment in Windows
• Part 4: Building your development environment in Linux
• Part 5: Getting started with Drupal
• Part 6: Building a custom module in Drupal
• Part 7: Structuring content for theming using XHTML
• Part 8: Styling content for theming using CSS
• Part 9: Understanding the database layer
• Part 10: Adding features for an extranet Web site
• Part 11: Using taxonomies in Drupal
• Part 12: Hosting and deployment
• Part 13: PHP development within Eclipse