Uh, oh. Looks like the folks at Blackboard should have just let well enough alone. Given a short period of time, a pluthera of prior art was able to quickly be located — enough to cause a re-examination of the patent. See the link:
I always wonder why a company would try to enforce a patent that is questionable at best. The whole process to defend the patent is expensive — and the ill will generated certainly can’t be worth it. Ah, well.