Windows 7 is now available on TechNet & MSDN to premium subscribers & some resources on Windows 7.
Ebook By Microsoft For Developers
Microsoft collated an ebook by MVPs for IT developers.
More Resources & Goodies For IT Developers From Microsoft
A new website & documents for developers on Windows 7 & software development using Microsoft products.
New Windows 7 Developer White Papers Released
MSDN released new White Papers on the features of Windows 7 demoed at the PDC2008 & WinHEC.
Quality & Compatibility Resources For Developers
Some links for developers to make their applications more efficient for the Windows environment.