OCAP Reference Implementation just released!
I just heard that CableLabs has released the OCAP reference implementation.
https://opencable.dev.java.net/ has a prominent link to the download page.
This gets you a windows program that implements the full OCAP API set.
This is good for the BD-J ecosystem, since BD-J and OCAP are very similar.
OCAP is (now) based on PBP 1.1, so many of the cookbook tools and frameworks
will work without modification. The GRIN scene graph and the animation framework
should just work.