Last night at the Consumer Electronics Show, Mr. Balmer announced that the Windows 7 Beta bits will be available for download from the MSDN and TechNet subscriber immediately. An open download of the Beta will be available Friday after Noon PST. 

Microsoft Partners with MSDN or TechNet subscriptions can get the bits from this link https://partner.microsoft.com/us/40084742, after logging into the Partner Portal.

At this site you can also download the Windows 7 Online Readiness Kit.

Windows 7 enables you to deliver strategic value—and grow services and licensing revenue. Review the Windows 7 Online Readiness Kit to better understand the capabilities of the Windows 7 operating system. The kit includes:
Windows 7 at a Glance White Paper
Learn about the new features of the Windows 7 operating system.
Windows 7 Deployment Guidance Presentation
Find information that can help you effectively manage a Windows 7 deployment project.
Windows 7 Quick Reference Guide
Get a high-level overview of Windows 7 security, productivity, and management features for small business, midsize business, and enterprise audiences.
Learn more about Windows 7 by taking the Meet Windows 7 Small Business online training course.
Recommend Windows 7
Test and use Windows 7 Beta so that you can recommend it —and deploy it—with confidence. Then combine the resources in the Windows 7 Readiness Kit with a customer-ready presentation for midsize businesses and enterprise customer audiences to help start conversations about the benefits of Windows 7 for your customers