FYI, for all of you interested in portraiture. Here is a short (1 hr and 53 minute) tutorial by Joel Grimes who does a lot of those gritty, contrasty and dramatic portraits of atheletes, musicians etc---plus he does a bunch of other stuff. He also has some other good video's on youtube and some detailed tutorials for sale on his website. ALthough he does portraits, there is a lot of good info to be had when watching his videos.

http://youtu.be/Z8m3bm6hC74