While I'm against putting any stuffing/dressing inside the cavity, this recipe linked from Wired Magazine caught my eye. It's your basic meat, stuffed with meat!

White Castle Stuffing
10 White Castle hamburgers, no pickles
1 1/2 cup celery, diced
1 1/4 teaspoon ground thyme
1 1/2 teaspoon ground sage
3/4 teaspoon coarsely ground black pepper
1/4 cupchicken broth

Directions:

In a large mixing bowl, tear the burgers into pieces and add diced celery and seasonings. Toss and add chicken broth. Toss well. Stuff cavity of turkey just before roasting.

Allow 1 hamburger for each pound of turkey, which will be the equivalent of 3/4 cup of stuffing per pound.

For those not interested in doing too much cooking: Wired's How To Make Thanksgiving Meal Out of Fast Food