OK, I know you're all excited to get your hands on theConsumer Preview. By the end of this week, I'll post installation guides for Windows 8 that cover clean install, upgrading from Windows 7, Push Button Reset, and, best of all, the new web-based installer.
But there's no reason to wait. Here are some download links for the Windows 8 Consumer Preview.
This is the web-based installer. It will check to see if your PC can run Windows 8 Consumer Preview and select the right download. I was told that this installer utilizes a specially created compression scheme that is tailored to the unique format of the WIM (Windows Imagining) file that makes up the bulk of the Windows 8 download, so this is actually the fastest way to install the bits. You can, however, use this method to trigger a download as well, so that you can copy the build to a USB memory stick or DVD and install it manually that way.
Looking to go the manual route? From this site, you can download ISO images that you can use to install Windows 8 to a virtual machine or burn the image to disc or copy to USB memory stick and install that way. There are 32-bit (2.5 GB) and 64-bit (3.3 GB) versions of the Consumer Preview available.