Get your own copy of the Windows 8 Developer Preview directly from Microsoft here: [msdn.microsoft.com...] I see that it requires a clean install, so you can either put it on its own machine or virtual PC. Also, I've heard that it isn't very stable yet, so I wouldn't use this as your primary OS.
Anyone tried it out yet?
There's a slideshow of some of the interface on the Microsoft news site: [microsoft.com...]
I ran into a glitch when trying to install this on VMware. You'll get a HAL_INITIALIZATION_FAILED error if you're using most versions of VMware. Reportedly the beta version of VMware will handle this. I guess I'll have to wait a bit before trying this one out.