Let me get this straight...
SCO says that some of the open-source Linux kernel is actually copied from their proprietary code.
Everyone who asks them "okay, then, can you show us the code in question?" is told that they have to be under NDA before they can see it.
Have I got that right?
Because if that's true, then the following must also be true...
If the code in question really has been copied, as they allege, then the code in question is world-visible in the open sources already.
So why the cloak and dagger bit? No need for an NDA if they're going to show you their copy of something that's already in the public domain.
Personally, I think SCO has two things: Jack, and shit. And Jack left town...