After spending some time studying the factory Camry/Aurion wiring diagrams (http://toyota.aitnet.org/Camry/Camry_2007_wiring_diagrams.pdf) I think I may have figured out the problem. I'm going to ditch my existing connectors for the back of the A/C display and use the proper connector that was designed for it, as technically right now the only two wires that are going back to the A/C amplifier is the power and communication wires. The two wires that my original connector is missing (red and black) are only for the A/C controls on the steering wheel, so I won't need to worry about those right now, but all of the other wires are in different pin locations, so if I use the proper plug all the right signals should go to all the right places.
According to the diagram, there's two hot/cold mix servos for the digital A/C, one on the driver's side of the A/C blower unit and one on the passenger's side - Which makes complete sense since that'll be how it sends two different temperatures left and right. There's also the addition of the interior temperature sensor and also the solar temp sensor on the dashboard, but I don't think I'll need to worry about that as that should only be required for the 'AUTO' function, which I've never bothered using in any of my Toyotas in the past. All of the other A/C components and wiring appear to be the same, so fingers crossed it won't require much more work to get the heat coming through :)
In the meantime, I took these night shots of the unit as I love the blue hue it produces when the headlights are on:
Changeover manual A/C for Dualzone climate control
in Aurion / TRD Aurion Club
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Did you actually get it work?