Adam has a very good post on not just his take on the SCO/IBM case (which I have been trying to follow in some respects at groklaw), but good reason to back up the claim that SCO is simply on a scavenger hunt for money. My favorite part:
The same code [SCO] licensed (or close enough) was available to the public at-large for years (the archive is about three years old). There’s no telling who added it … except via CVS. Which explains why SCO will not divulge the code, even to IBM. If you know the file, and you know the code, the CVS log is public information and they can simply, and quite easily, go and see who put it in there.
I highly recommend looking at his post: The SCO Delusion