WAIK has been updated to support Vista SP1 and Windows Server 2008. I recently worked with the RC1 release and there were no surprises. It’s nice to see that MS has copped on and left the file extension as an ISO to stop confusion – the previous version was an IMG file.
You will use WAIK to generate automated or customised installations of Windows Server 2008 or Windows Vista. The primary tools are ImageX (to work with WIM images), Windows System Image Manager (WSIM: to create XML unattended answer files) and to create customised WindowsPE boot images.
I covered it a little in my WDS whitepaper and Rhonda Layfield did a great job on describing a Vista unattended installation in one of Mark Minasi’s newsletters. You’ll also find WAIK is covered in two of the Mastering Windows Server 2008 books ("Essential Technologies" and "Enterprise Technologies").