So just tried a few of Jim's gems on EV-CAN with mixed results (as anticipated based on the ELM thread)..
797/79A works fine (main vehicle controller?) so VIN, L2/L1 count, DCQC count come in fine as well (I'm sure) as a bunch of other goodies yet to be discovered.
792/793 (OBC?) doesn't work as anticipated, but probably because I'm on a 2013 at the moment and the OBC is built in.. so to speak. I'm guessing 792/793 for EVSE info will work fine on my 2012 which is fine because all we really want is ampacity for Brusa control on 2011 and 2012.
745/746 (traction control?) for tire pressure doesn't work
So I guess CAR-CAN can reach through the VCU to EV-CAN but not the other way around. Bummer.. Maybe this info is reflected in the VCU data somewhere..