If they open-sourced it, it would be difficult to standardize. With a major release every 12-18 months, it's already difficult to drive adoption (takes about 12 months to get &#62; 90% user base per version).<p>I will agree - they might want to consider open sourcing the Linux version. I know nothing about Linux so I'm guessing it's related to trying to support the "anything-goes moving-target many-flavors-of Linux" issue.<p>OSX is another matter (blocked OSX APIs).