We have a group in IT at the University of Missouri that is working on a Blackboard building block. They are building on work from Rochester, and targeting (I think) Blackboard 9.1.
I plan to beta test it in a course I'm teaching this summer. Right now gradebook integration doesn't work, but I think it will by the end of the summer, if not sooner.
It will be open source, and freely available to other institutions that want to use it.