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I'm glad to see OSS move in this direction as I thought that Longhorn would be out way before it. Of course, this still isn't "out" by my definition. Sure, I could compile it and deal with bugs and issues and such, but I'm not going to. There is a big difference between good work and a final project. Now, once Ubuntu/Fedora/etc. include it as the default or good-as-default, then it will be out.
I have a friend who thinks that this will all be done by the middle of the year. I still think that it will be a year before it's really ready for a production environment.