Smiley Really Cool vid.. been waiting for something like this for Vista.

I have a question for Jamie and Andrew..

We have a product that has its own boot code, which pre authenticates the user before allowing boot. Is possible to hook in some form of authentication into the boot loader, other than from a keyboard menu item at the pre boot time, say from a USB device or user name and password or other devices, X509 Certificates ? etc.. this would really help our development onto vista? without having to use bespoke boot code?

Thanks