Sorry if this is an obvious question, but I can't find it on Sheldon's site. I'm hoping that it's such an obvious question, they didn't bother answering it.

Can 8-speed Hyperglide cassettes be installed on a 7800 or 7900 hub?

Turning my old Masi Gran Criterium from a wall-hanger into a rider. Going with an Ultegra 6400 Tricolor drive train and building up some nice, speedyish wheels for it.