Ok since I have been asked by a couple people what my method is for coloring, I will post a 5 step tut. It is real easy and is for photoshop cs.
Scan your pic in greyscale. if you drew it in photoshop turn it to greyscale too.
Pull up your pencil work. If you want the pencil layer to show go to channels. Now in the channels section there should be 4 tabs at the bottom. Click the left most one and it should higlight your blanks outside your pencils. Now go to select and inverse that and the selection should have all your pencils highlighted now. Do not deselect anything.
Now go back to layers tab and make a new layer and name it inks or whatever you are comfortable with. Now that you are on your inked layer take the paint bucket and choose black and fill the selection. deselect this and tada you have your inks on that layer you just made.