Hi!
Just to avoid any possible duplicate work: A member of this list already has a working C155 color display driver. So if you were thinking of working on this: Please rather do another TODO item.
I'm supposed to be merging that driver during the next couple of days.
Cheers, Harald
p.s.: I'm back in Berlin now, will be working with zecke of getting layer2 (bi-directional) up and running.