It is all over the web, but yes, IBM will use Drupal for one of their community sites.
IBM focuses on Drupal for new developerWorks series | drupal.org

The popular IBM developerWorks site has started a new series entitled "Using open source software to design, develop, and deploy a collaborative Web site". After reviewing numerous open source packages such as Typo3, Mambo, and the ever-hyped Ruby on Rails, they "decided to use Drupal", remarking that it "provided the right combination of framework and flexibility . . . to get the job done". They also echo many of our user's concerns about potential complexity: "There is still an apparent learning curve to the "Drupal Way" of creating sites, but significantly less compared with other CMSs. The ability to use PHP to move freely between the business logic layer and the presentation layer (using the PHP template engine) was also very appealing."

Direct link towards article here. And it is very nice that IBM lists Drupal right between the "real big ones",

• Drupal - An open source content management system
• MySQL - An open source database store
• PHP - A Web-based language for supporting dynamic content with PHPMyAdmin and SQLBrowse
• Apache - An open source Web server
• Eclipse - An open source development environment
• CVS - A source code management system that tracks changes in your code

I think IBM (See Dries) is right on when they see Drupal is both "outofthebox" yet also a "framework" that needs love and custom code to do anything. I also liek the proces on /how/ IBM decided and the transparacy of it a lot. See for example:

I hope Druplicon will star soon in a IBM commercial, "...does he have a name?"

And we already made the frontpage of digg, so no need to digg more .