So Finally Windows 8 Released by Microsoft on MSDN and TechNet for Subscriber Downloads
Few Details--
Windows 8 (x86) English
2511 MB
File Name: en_windows_8_x86_dvd_915417.iso
SHA1: 22D680EC53336BEE8A5B276A972CEBA104787F62
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Windows 8 (x64) English
3416 MB
File Name: en_windows_8_x64_dvd_915440.iso
SHA1: 1CE53AD5F60419CF04A715CF3233F247E48BEEC4
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Other versions Detail can be Found here
http://msdn.microsoft.com/en-us/subscri ... 0&FileId=0you can download if you are Sbscriber