Nocona in LGA-775?

Intel releases their first 64-bit workstation processor on Monday:

Anyone know whether this chip is going to work in a Grantsdale / Alderwood / LGA-775 motherboard? If not, which motherboards will it work in?

Basically, I would love to know if there’s any chance that if I buy a Grantsdale system this summer, I’ll be able to upgrade it to an Intel 64-bit processor without having to get a whole new motherboard :-(