I currently have the LeafDD installed, but I also backed the myEV logger via KickStarter. So I started wondering if the Raspberry Pi (or Arduino) could act as a proxy, so I could drive both displays simultaneously.
I also would like to be able to read some of the CAN messages for use with a small text display (via the SPI interface or something similar), and eventually, a secondary larger display with nicer graphics via composite/HDMI, while using some of the Pi's I/O capability to automate some non-critical accessories based on certain CAN messages.
Looks like you have made some real progress, so I got some reading to do, thanks for the links!