I agree that this is a welcome tool. As companies continue to use increasing amounts of open source in their software, they need better ways of tracking it, to make sure that they comply with the licenses. This is particularly true for software companies, whether they are commercial or open source.
I'm not sure that Fossology will take market share away from Black Duck or Palamida, however, since the functionality seems to be more limited. I'd be interested in hearing a review from someone who used the software.