More out of academic interest than anything I downloaded and installed the Windows 8 developer preview in a VM last night. Installation went smoothly enough, and only took 10 - 15 minutes, and when it had finished, Ughhh. I hated it.
It looks like a child's toy and there is nothing intuitive about it in my opinion. The much heralded tiled interface is ugly and confusing, and the desktop mode is nothing more than a kludge that doesn't provide a proper desktop.
Oh, and I haven't figured out how to quit a running program, yet.
You can get it here if you want to try it - http://msdn.microsoft.com/en-us/windows/apps/br229516
Discussed here Dan - http://www.idnetters.co.uk/forums/index.php/topic,26587.0.html
Your comments pretty much echo mine I made when I tested it.
Ahh - missed that - I'll re-post over there - Rik can delete this thread at his leisure :)
I don't work here any more, Steve. ;)