From what I can gather(my pure speculation), Hyperion (Ben, not the Friedens) had the contract to develop OS4 and were paid in full for it but refuse to turn it over, citing that they are owed even more money than the contract allowed for.
I'm not sure but I think it's not about the money perse. I think there was also a clause that if Amiga Inc. would go broke or sold that then the rights for OS4 would go to Hyperion.
In the mean time Amiga Inc. has been sold to Amiga Inc. (aka KMOS inc.) to get rid of the three programmers that wanted to get paid for their work (Wayne, I think this sounds familiar). So I think Hyperion wants to use this fact to try to claim the right for OS4.
It would be nice if also somebody from Hyperion could be found to answer some questions.
greets,
Staf.