The WGA team have finally provided a written response to the reported OEM BIOS Hacks regarding Vista:
I know many of you are aware of reports of hacks that attempt to exploit our OEM BIOS based activation. Were aware of this type of hack and I wanted to take a minute to describe how these work and how we plan to respond.View: Full Article @ WinBeta
First, what is OEM BIOS based activation?
Heres a little more information on how OEM BIOS based activation works. This form of product activation is also known as OEM Activation or just OA, which is how Microsoft refers to it and how I will refer to it in this post. Back at the launch of Windows XP when Microsoft introduced Windows Product Activation, we recognized that as easy as end-user activation is, it still represented an extra step.
Link: WGA MSDN Blog