Steve- If you Bond the utility supply with the Main Bonding Jumper at the Service would you approve of installing a jumper wire between the neutral screw of a receptacle and the ground screw of the receptacle somplace else downstream on the system? That's essentially what you would have if you bond at the Utility Service and then remotely at a generator an don't switch the neutral with the transfer switch. The concern is having current flow on the grounding conductor. If a person is not using the Grounded conductor for a current carring conductor then I agree with you. Code reference: 250.28, 250.142 NEC '02 Ed.
Edited to add code reference.
[This message has been edited by George Little (edited 09-28-2006).]
