Tutorial - Antialias and coloring
This goes into more detail about my coloring process and how I deal with paint program's natural tendency to apply anti-alias to my work.
In Photoshop you can deselect antialias for filling in your colors. I recommend always deselecting antialias whenever possible unless you're trying to make the edges smooth and blurry or shrinking the image for the internet.
As usual, any questions I will try to answer in the comments below.
1st March 2012