I have the SCO reply to Red Hat, which you can read here. We'll be writing more about it shortly, but meanwhile I thought you'd like to see it for yourselves.
Here's something else of interest, a comparison line by line Dr. Stupid did for us (at work on his toy operating system) of the original S3 in September and the recent Amendment to the S3, which SCO just filed. Note the difference in the indemnification section, among other changes. Of course, toy OSs don't always get everything right, but it's still a very useful comparison.