Fantastic charcoal portrait DVD by David Kassan
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Here's David's DVD trailer page. He apparently took a homeless man and hired him for an on-camera portrait session. The piece is truly masterful. It had me reaching for my credit card, but alas, there's no link for pre-orders, so I am on the list to be informed when this great DVD is released. Looks like he uses some techniques I haven't seen before, so I'm definitely buying!
No point posting his YouTube videos one by one. Here's his blog, where he posts lots of awesome stuff.