The Santa Cruz Operation, probably the most hated company that has even been involved in unix, has claimes to "own unix" for years, trying to squeeze cash out of a lot of companies. Several smaller companies have paid up years ago, in fear of expensive lawsuits. IBM and Novell only smiled and told SCO to show some evidence. SCO never did, and a few years back a judge told SCO to shut it. Today there's Breaking News : Novell owns the rights to unix that were claimed by SCO.
I wonder what's to happen to SCO now. Their closure has been predicted for years, and now, with no big money won and huge legal fees, I think SCO better jump in their grave. IBM probably sent a letter to SCO saying "I told you so" and chances are the smaller companies that had paid already will now sue SCO to get their money back.
It's pathetic to see how SCO couldn't accept their losses in the unix department and as a reaction tried to sue the whole world for something they didn't own.
The Register has all the details.