Don't learn on a right handed guitar like Doyle Bramhall II. He left it strung for a righty so he plays upside down.
http://www.youtube.com/watch?v=rq5oCP5f1PU
Mark Knopfler is a left hander that learned to play righty.
http://www.youtube.com/watch?v=q2rx3IAEISA
Gary Moore - a player barely known in the States.
http://www.youtube.com/watch?v=4O_YMLDvvnw