This might be of use to some of you. I'm certainly considering it for my project. It basically teaches you how to isolate a selected color and grey all other colors out, which gives you the ability to focus on a person, place or thing. If you recall the movie Schindler's List, it was done in black and white. Spielberg periodically used color, but only for the color on a little girls red coat. Anyway, check it out.
http://www.reelseo.com/how-to-create-the-sin-city-effect-adobe-premiere-reelrebel-44/
http://www.reelseo.com/how-to-create-the-sin-city-effect-adobe-premiere-reelrebel-44/