I've aquired the components to prototype the job at hand and spent a good couple of hours working on it.

Turns out that the libraries provided by seedstudio aren't the greatest, am going to have to write my own to get the V230 EPD working on this development board on this atmega.

Their libraries work fine on a Leonardo with it's atmega32u4, but it's horrifically slow and requires an SD card as a frame buffer - I want to avoid the frame buffer if I can, hence Arduino Mega 2560, but if I can't work the code out for that....

Final product will either be an atmel chip with enough memory to handle the frames, or use an SPI flash chip - I am probably going to ditch the GT20L16 font chip that's on the demo board in the final product too.

Long story short - all the parts work, they just don't work together - yet.