Get Windows 8...!!! OFFICIAL

Try out the next release of Windows Server, for scalable, dynamic, multitenant-aware, cloud-optimized infrastructure. Find out what's new and get resources to guide your evaluation in the new TechNet feature package Windows Server "8," a Cloud-Enabled OS.

http://technet.microsoft.com/en-us/hh872748?prod=zWSz&tech=zCLz&type=zpagez
Get it here, For Downloading you will need to have a windows live or a Hotmail id. You can also Sign up
Windows 8 consumer preview is available here-:
http://windows.microsoft.com/en-US/windows-8/download