what an awesome idea!
i know the Virge used the Phillips "Scenic Highway" bus, which as i understand it, was/is fairly open for development.
Just the normal driver issues for the miggy to use Mpeg cards etc. (there wern't any).
The virge/scenic highway combo allowed the external video (whatever it was) to be mapped as a texture for 3D rendering amongst other things. so maybe the voodoo3 has something a little more advanced?
eitherway, wicked idea! :-)