ReactOS (Score 2, Interesting)

I don't know if anyone has mentioned it yet, but ReactOS could be very interesting as far as the OS "wars" go. Link to wikipedia article: http://en.wikipedia.org/wiki/Reactos A little blurb from the site: "ReactOS® is an advanced free open source operating system providing a ground-up implementation of a Microsoft Windows® XP compatible operating system. ReactOS aims to achieve complete binary compatibility with both applications and device drivers meant for NT and XP operating systems, by using a similar architecture and providing a complete and equivalent public interface." Basically if they can deliver on it you will have an open source operating system capable of running all of these legacy applications and whatnot.