Where did you hear 1.1V core voltage?
I know a few boards go that low but not many, and even so I can't imagine the Palomino requiring only 1.1V.
BTW, Palomino is hardly a new architecture it's not even that much more than a T-Bird optimized for slightly higher clockspeeds and reduced power consumption/temperature. The Thoroughbred is the real 're-design' of the Athlon architecture. And you won't see an entirely NEW architecture from AMD until the K8.
And while it's likely that it will be compatible with current KT133A/AMD 760/ALI Magik 1 mobos we have no verifiable confirmation of that yet.
I'm thinking around 1.5V for the Palomino, or perhaps 1.4V at the low-end.