OK, now let's have someone make a cool screencast so we can easily skip to the "OMG it's full of stars" awe stuff and not have to waste time futzing with silly Microsoft user interfaces.
Windows within Parallels Desktop (OS X virtualization package) won't even run it. It needs hardware 3D acceleration apparently. I doubt Wine will work.
It's neat, but not that much better than Google Sky. Perhaps slightly better imagery, but I don't see why this would make Scoble cry if he had previously seen Google Sky.