Yay for MSDN. I'm downloading it right now, since they added it today. 2.42GB download. 44hrs on my IDSL connection. 4% Complete.
I hope it's better then the Alpha version. I had some problems with that. For a while, I didn't realize that the "Checked/Debug" version of the OS was less stable. It was locking up and crashing everywhere. I got the regular Alpha release and it was a lot better.
So... In like 2 days I shall know how good/bad it is.
Here's some screenshots Microsoft actually posted for anyone who wants a look: