Windows 7 Beta test version will be available Friday for regular PC users to download (Jan. 9, 2009).

AVAILABLE FOR DOWNLOAD NOW!!
x86 version
hxxp://download.microsoft.com/download/6/3/3/633118BD-6C3D-45A4-B985-F0FDFFE1B021/EN/7000.0.081212-1400_client_en-us_Ultimate-GB1CULFRE_EN_DVD.iso
Size: 2.43 GB (2,618,793,984 bytes)
MD5: F9DCE6EBD0A63930B44D8AE802B63825
SHA-1: 6071184282B2156FF61CDC5260545C078CCA31EE

x64 version
hxxp://download.microsoft.com/download/6/3/3/633118BD-6C3D-45A4-B985-F0FDFFE1B021/EN/7000.0.081212-1400_client_en-us_Ultimate-GB1CULXFRE_EN_DVD.ISO
Size: 3.15 GB (3,387,009,024 bytes)
CRC32: 8E2FAD39
MD5: 773FC9CC60338C612AF716A2A14F177D
SHA-1: E09FDBC1CB3A92CF6CC872040FDAF65553AB62A5

Read all about it and find out more at http://www.microsoft.com/windows/windows-7/default.aspx