According to this article:
In a keynote address at the 2009 International Consumer Electronics Show (CES), Microsoft Corp. Chief Executive Officer Steve Ballmer announced the beta availability of the Windows 7 operating system as well as the availability of the latest version of the Windows Live, a suite of personal communications services and applications.
"I’m thrilled to announce the availability of the Windows 7 beta, which is on track to deliver simplicity and reliability,” Ballmer said. “Windows 7 and Windows Live are part of an incredible pipeline of consumer technology that is making it easier than ever for people to communicate, share and get more done."
The beta version of Windows 7, Microsoft’s next-generation PC operating system, can be downloaded today by MSDN, TechBeta and TechNet customers. Consumers who want to test-drive the beta will be able to download it beginning Jan. 9 at http://www.microsoft.com/windows7.
Microsoft also announced the global availability of Windows Live, a free suite of communications and sharing applications. Windows Live makes it easy for people to communicate, share and keep their online lives in sync and in one place with one login. The new and enhanced Windows Live services — including PCMag.com 2008 Editors’ Choice winner Windows Live Messenger — along with Windows Live Mail and Windows Live Photo Gallery are designed to work seamlessly with more than 50 popular Internet services.
Starting from January 9th, the Windows 7 Beta will be available for download at:
These are only available for limited time to the first 2.5 million people who downloaded the beta.
Download Windows 7 Public Beta ISO (32-bit)
Download Windows 7 Public Beta ISO (64-bit)
The Product Key to Fully Activated this product for unlimited time
Windows 7 Beta 64-bit Product Key
Windows 7 Beta 32-bit Product Key