Windows 7 Beta launched yesterday  in CES 2009 and it is available for customer preview.

Windows 7 Beta Customer Preview Program can be downloaded via  Technet or Official Windows 7 Website.

Hardware Requirements for Windows 7

• Processor: 1 GHz 32-bit or 64-bit processor
• Memory:  1 GB of system memory
• Hard drive: 16 GB of available disk space
• Video card:  Support for DirectX 9 graphics with 128MB memory (in order to enable Aero theme)
• Drive: DVD-R/W drive
• Internet connection (to download the Beta and get updates)

Technet :  Windows 7 Beta Customer Preview Program

Official  page :  Windows 7 page

ISO File Download Links :

Windows 7 Public Beta ISO (32Bit)

Windows 7 Public Beta ISO (64bit)