I just got one of these screens for xmas from my GF 
it came with a demo board with a pre-programmed pic16f57 on.
it was from Sure electronics, the demo board displays an alternating checkerboard on the lcd.
screen is WG12864A.
i downloaded the library from the wiki, installed it, and uploaded the pong sketch to a 168 on a boarduino, but im getting nothing,, the wiring instructions on the wiki were confusing at best.
wiring pin3 up the same as i do with my 16x2 lcd's just gives me a blank screen. anyone got a schematic of wiring this type of LCD to an arduino properly?.. with less confusion
would be nice to play pong again XD