The Windows® Automated Installation Kit (AIK) for Windows® 7 helps you to install, customize, and deploy the Microsoft Windows® 7 and Windows Server® 2008 R2 family of operating systems.
The WAIK was re-published to the download center at http://www.microsoft.com/downloads/en/details.aspx?FamilyID=696dd665-9f76-4177-a811-39c26d3b3b34. Looks like the only thing that was added were some languages to Windows PE.
[UPDATE for 11/2/2010] Please disregard this blog post. The product group has now clarified nothing changed in the .ISO and they only changed the version number on the manifest for the download center. I am not happy about that. Sorry for the false alarm. I received some bad information. Next time I’ll double check first.