I've noted in a number of places the impressive and continuing rise of Sun to become pretty much the leading defender of the GNU GPL faith. Anyone who had any doubts about its ultimate intentions might like to read this post from Ian Murdock, the -ian in Debian, and one of the senior figures in the GNU/Linux world:
I’m excited to announce that, as of today, I’m joining Sun to head up operating system platform strategy. I’m not saying much about what I’ll be doing yet, but you can probably guess from my background and earlier writings that I’ll be advocating that Solaris needs to close the usability gap with Linux to be competitive; that while as I believe Solaris needs to change in some ways, I also believe deeply in the importance of backward compatibility; and that even with Solaris front and center, I’m pretty strongly of the opinion that Linux needs to play a clearer role in the platform strategy.
Watch out little GNU/Linux, there's a big OpenSolaris heading your way....