Yes Steve,
I am also very interested in your take on grounding in the digital domain for sure.
I have almost everything in my system AC grounded, including all external power supplies, and noticed a nice improvement in weight and focus AC grounding even my network equipment. I do realize that these are galvanically isolated with the router, but there is still a nice improvement here.
My tube preamp is the only thing that is not AC Grounded, as this creates a ground loop with my mono amps.
Thanks
Paul