BM's actual copyright status?

[Rafael]

Hi,

While I am busy with pleasant things, for once, and putting my old manuscript folders in order, one big question:

What's the state of BM's actual copyright situation?

So, Wizbro owns... Something.
And supposedly, the Arneson estate owns... Something.
And Judges Guild owns... Something.
And Flying Buffalo owns... Something.
And Dustin Clingman/ZGG owns... Something.
And Code Monkey Publishing (correct name?) owns... Something.

Can someone enlighten me, or rather than that, fill in the *somethings*? -I used to have a pretty good idea about things, but my info is surely at least five years old.

Thanks,

Rafe