As part of their expanding developerWorks series of articles IBM have decided to use Drupal for a sample IT project entitled “Using open source software to design, develop, and deploy a collaborative Web site”.
We did have to invest some time to learn the Drupal way, and the framework just seemed to make sense. We also felt that Drupal provided the right combination of framework and flexibility to break out of the framework when needed to get the job done. With all things considered, we decided to use Drupal. The landscape of open source CMS is continuously changing, and in the future we'll revisit these and any new entries in the field.
Given the extremely high standard of the developerWorks articles I'm going to be keeping an eye on this. I'm always on the lookout for new ways to make Drupal jump through hoops.
Update: The second part of the series has been published, focusing on designing for an effective user experience.
Update: Here's an overview page linking to all 5 articles.