My personal 12" Powerbook G4, 30" Cinema HD, and 2x 23" Cinema HDs. This pic is a few years old (just found this sub and figured I would share). I was driving the 30" off of my Powerbook at the time, and the dual 23s were running off of a Dell Precision 390 running RHEL 5.
How well was the powerbook g4 able to drive that 30in display? Are those things 2560x1600?
It was a limited resolution, but it actually did pretty well. Mostly just had terminal windows running on it though.