[Jethrow]

Any reason we cannot go old school and just use a cannister from an older EFI car that was not ECU controlled, then plumb the 3 lines from the cannister to the fuel tank, the manifold behind the throttle, and to a vent?

At least thats how I think they were plumbed. And don't they only open when the right vacuum combo is reached, usually when not idling. And if you ran the vent from behind the mass flow meter, then the total air should still be accounted for.