Sorry to bump but I read an interview that Gibson did with Entertainment Weekly discussing why he hired the non professionals actors and I thought yall would enjoy. He says, "It's much easier to believe a character who doesn't have any baggage." Check out the whole interview -- really good. I am really excited to see Rudy Youngblood...
Here it is:
http://www.ew.com/ew/report/0,6115,1...612|1_,00.html
Oh and check out the pictures! They are amazing!