I knew Blackboard had a patent application for their LMS, but apparently it has been granted and their first act was to file a lawsuit against one of their competitors. This is terrible on many levels. Not least that such a stupid patent should never have been granted,. Of course, the USPTO would probably let me patent my nose hair.
I certainly won't be using Blackboard for my XML class in the Fall, and I'd encourage other instructors to drop it too.