My readers are the best. Here's a note from Dr. Stupid, which I decided to put up here, in case some of you don't read all the comments:
"Check this: ftp://ftp.cobalt.sun.com/pub/products/sunlinux/5.0/en/updates/i386/SRPMS/
"kernels as recent as 2.4.20.
Well, then, it's under the GPL. No protest from SCO. License says they can do it anyway. You do the GPL math.
SCO, Sun, and MS are the Keystone Kops of the GPL.