I seem to remember reading that Windows has chunks of Unix code buried within it, especially the Network part of the code (forgetting the 'Dos comes from Unix-cp/m' rumour). How much would Microsoft owe if it was found to be true and Novell sued, but of course I'm forgetting that MS and Novell have come to an understanding, win win Microsoft.

Overall though, well done Novell, you have my vote.