I smoke turkey breasts all the time. One of my favorites.
The first time I tried it I did a pastrami brine since I didn't have any tender quick then. It came out pretty good but I also only gave it a light coating of pepper.http://www.smokingmeatforums.com/for...riander&page=2
Did another one but don't know where that thread it as.
Next time I buy a breast I'm going to cure it properly with TQ and other seasonings and then smoke, see how well that comes out.