Wow, your comment is grayed out like it was downvoted but you've only asked MS to liberate an OS, which is something that should be supported. True hacker spirit there.
HN doesn't like subtext. Of course, it's terribly impractical to ask MS to release the XP source code, and that might even exacerbate the ongoing need for security patches. But look at all the millions being spent now, and imagine how different the situation would be if these enterprises were able to choose a free and open source OS from the start.