Windows 8 Consumer Preview Setup will check to see if your PC can run Windows 8 Consumer Preview and select the right download. Setup also features a compatibility report and upgrade assistance. Built-in tools for creating an ISO or bootable flash drive are available for some previous versions of Windows (excluding Windows XP and earlier).
Here is the link: http://windows.microsoft.com/en-GB/windows-8/download
For those of you who like to VM (Virtual Machine) this as a testing machine there is a ISO file that you could download here.