Color Calibration (Score 3, Interesting)

I've used the gimp off and on, but I always come back to the color calibration bug. PS and most of the other commercial packages offer this features, but Gimp is still out in the cold. I understand that the ICC profile system may not be "free" to implement, but it's a critical part of the commerical world of photography. I still have hope, but until that day, I need to use PS.