Windows 8 Consumer Preview is here (build 8250). Feel free to download and test:
Direct download links to ISO images with Windows 8 Consumer Preview:
One Product Key for all: DNJXJ-7XBW8-2378T-X22TX-BKG7J
Windows 8 CP will expire on January 15, 2013.
Here you can find more links to more languages:
Big change: the Start button has gone forever :)