Sorry, but this is just KILLER:

100% undetectable mal-ware

How? Simple: by putting the root kit into the Hypervisor. This particular exploit takes advantage of AMD's virtualization technology - no mention of whether or not Intel's Virtualization Technology (VT) will be susceptible to similar attacks - though I would suppose it could be.

And what's a hypervisor for those that don't know? Simple: traditionally an OS sits 'above' your hardware - and 'below' your applications - building a 'stable' platform where you can run your software on various, different, inter-communicating pieces of hardware (quite an accomplishment when you think about it). Problem is: most OSes demand 100% control of the hardware. Hypervisors are just another abstraction between the Hardware and any OSes loaded on to the computer - and it just so happens that they're uniquely suited to allowing multiple operating systems to 'control' the hardware - making it possible for multiple OSes to run simultaneously. In fact, because the abstraction/virtualization in the Hypervisor is so spiffy, the OSes you're running can all think they've got 100% control of their underlying hardware (and they do - a specialized, virtual, set of hardware dedicated just for them).

So, as you can see - sticking a rootkit BELOW the OS is just a brilliant idea. Of course, I'd be pissed if it happened to me, but it's just a KILLER idea.