On the PHP Zone today (part of the DZone network) there's a new article that asks "Can learning Drupal get you a job?". They look at some of the trends and popularity of CMS systems and wonder how they could help your job seeking potential.
The question is - should you bother to learn it? Learning new skills is always helpful to your career prospects and Drupal is gaining more recognition, but an experienced developer with expertise in a specific area like Java or .NET probably doesn't need Drupal skills to get a job. Large website developers and less experienced developers however, would see a lot more benefits from learning Drupal.