poohbear,
We have blatantly stolen the recipe from Alton Brown's Good Eats show on Food Network. We copy his brine recipe to the letter, and it is fab. I can send you the link when I get home from work, but if you go to FoodTV.com and search for Good Eats Roast Turkey, it will be there.
And, yes, we soak it and it is moist, even the day after with leftovers, which is unheard of.
Let me know if you would like the link, I will be heading home shortly.