http://www.naturesvariety.com/tryit/index2.lasso
If you sign up they'll send you a coupon via email (pretty immediately).
If you check the box for trying the raw diets they'll give you a coupon for a free 3# bag of medallions with the purchase of any other frozen NV diet.
If you check the box for the kibble (raw instinct - grain free, or the prairie) they'll send you a coupon for a free 4 or 5# bag with the purchase of any other bag.