This will be my first deviant submission, I completed this a few months ago using a media called liquidlead. It's a mix of about %60 eraser work, %20 pencil and charcoal, and %20 liquidlead (which is emulsified graphite dust fed through an airbrush). You can read more about the technique at LiquidLeadArt.com
Hope you guys like it!
I forgot to post this last time, but here's a link to an extreme closeup of the mouth: Link
The original is 20"x30" on CS 10 Illustration board.
edit: Wow! Thanks to all those who've added this as a fav!