Hi all. I am also developing a ks0108 128x64 GLCD interfacing card.
But instead of using pricey components,I just use one cheap 16F628A chip. You can find that chip everywhere. It's poormans GLCD interface. I am using i2c protocol (since 16F628A don't have I2C HW, I use bitbanging). It'is almost done and working. At least I can draw something, Now thinking to modify ks0108 library to make it work with it. The hardest part 
Mark S, I wonder that if you compleeted porting your library, If you have that libray, I can use it too and could make my Interface to compatible with that libraries i2c routines...Thanks.