While Moodle started life within an academic environment (Martin D. was once upon a time a WebCT admin) it has been used by corporate training departments for at least 6-7 years now. The adoption by corporate has accelerated in recent years for the same reason it has accelerated in the academic environment. Reasons are: a.) Moodle is as good as and in many ways better than most of the commercial alternatives and b.), commercial LMS platforms have gotten really expensive. Moodle remains free!
Corporate may use Moodle in different ways than academic organizations, however delivering on learning objectives is a common outcome. There is not as much emphasis on formal testing in corporate learning environments and the social collaborative features may be more widely used. Corporate is more concerned with quickly building competencies and getting groups working together on shared problems and challanges. Managers have different ways of assessing learning outcomes than the use of grades, so other features in Moodle are often more important. Moodle is also widely used by corporate for regulatory compliance training.
While most of us may spend the first 20-25 years of our lives in a formal academic learning environment, we spend the balance of our lives in a workplace setting where learning is life long, and often more informally structured. Corporate spends significant sums of money supporting many forms of workplace learning. In the past decade corporate has learned that having a trained workforce is the only way they will retain any kind of global competitive advantage. Moodle facilitates this well and some Moodle partners have focused on this area of application as a core part of their business. This has resulted in features being added by Moodle partners that support different ways of tracking and structuring the learning experience for the corporate user. BTW: one post to this thread has misleadingly stated that the ELIS solution from Remote-Learner is a commercial offering much like Blackboard. This is totally false. ELIS is licensed exactly like Moodle (open source) and in fact will have a community distribution and support very soon. A second such solution is now coming available from another Moodle Partner and will be licensed the same way.
Lastly, your Bb counterpart is simply stating Blackboard spin. In fact, there is not two separate versions of Moodle (one academic and one corporate). There is simply different ways people have found they can use Moodle. This is a core strength of Moodle. That is, being open source it does not force you to use it the way some all knowing commercial software vendor says you must. Use it however you want in support of your learners.