How committed is IBM to the open-source movement? Officially, IBM is the world’s loudest promoter of open-source software, spending millions to run Linux advertisements and fund an open-source development lab, and devoting hundreds of its own programmers to cranking out open-source code.On the same site, “Free as in freedom” used to be the rallying cry of the open source movement, back in the day when volunteer hackers did the programming. Now, with big companies writing most new open source code, will some of that freedom go away? Will the movement be co-opted? Maybe it already has been.