I've been thinking about this for the last few months. I've colored my hair ever since it went completely whitish...probably a good ten years or more. It's such a pain. I use Loreal Exellence. It covers the gray pretty well. My hair dresser says to start with the gray roots, and leave that on up to 40 minutes extra before coloring the rest. That scares me, but she says it won't harm the hair. Then put the rest of the color on the remaining hair. I haven't been brave enough to leave it on that long though.
I.