While I hear many stories about how the Google way is so great towards OS-development (and they are), I'm starting to like IBM more and more as well.
The first time was with an IBM SWOT on drupal. As a Drupal evangelist, I liked it. Then I found the IBM Cambridge with paper. It fits nice with my teaching and research. Now I'm reading how IBM supported Apache in the early days (I'm reading "the World is Flat"). It does make me wonder what companies have been key to create the OS business ecosystem and how come I hear so little about IBM and OS.