I have the same exact problem. I have a friend that I met back in high school who can play scales at lightning speed and his hand looks like it is hardly moving at all. I have tried to get that down but it is freaking hard. I think the best way to do it is to practice the stuff like Azrael posted earlier a lot, and I mean A LOT. I have improved by using this kind of exercise, but my pinky still freaks out. It is just a matter of practicing control in moving your fingers separately one at a time without moving the others.
Thomas