Build Number:
8250.0.120217-1520 (Consumer Preview)
Checksums:
Windows8-ConsumerPreview-32bit-English.iso
MD5: 671192F356C9AF5676F9083E4F865F27
Windows8-ConsumerPreview-64bit-English.iso
MD5: CDA63E335FB9AF5354C63441F5AA5169
Product Key:
DNJXJ-7XBW8-2378T-X22TX-BKG7J
Find your localized version direct from Microsoft -> windows.microsoft.com/en-us/windows-8/iso