nitropowerd- that's a neat little gizmo, I guess I'm a bit of a technophobe though, I'd be scared it'd break. I don't know I'll give it some thought.

DieselDan - Wheels manufacturing seems to make a shimano splined campagnolo spaced cassette, but I don't see one the other way around. Campy does make a freehub body, but they say it doesn't work with veloce, though I'm not sure I believe that. The shift kit though I'm not sure what you reference would not help because I have all shimano except a hub.

Wheels manufacturing does additionally make spacers but I've looked around some and it seems to be difficult to tell without seeing the cassette in person if the cogs are on a carrier, which could foil a conversion by spacers. Changing the hub would be a failsafe.