The first method came about from reading that one of the reasons that it is recommended that stuffing not be cooked in the turkey is that if the stuffing is cooked to a safe temperature, the meat is badly overcooked. My solution to this? Cook the turkey (following the usual oven method) with a heat exchanger to help cook the stuffing from the inside. 8 inches of 1" copper pipe, capped at both ends and 10 feet or so of 1/4" copper tubing tightly coiled into a 2-3" coil, and soldered into holes in one of the caps on the larger pipe, and the whole thing filled with water.
The large pipe was inside the turkey, the coil outside and exposed to the ambient oven temperature. The idea was that the oven would heat the water in the coil, and convection would circulate it into the turkey, cooking the stuffing from the inside. It seemed to actually work, too. The downside is the risk that one of the solder joints would fail after the water had heated up to ~300+ F. While that didn't happen the one time I tried it, the risk lead to the device forever after being referred to as "The Turkey Rocket". PS: Don't try this for your first dinner where you're inviting your parents and your girlfriends parents over. You might not survive. :)
Method #2 is a more recent method -- Sous vide cooking. You can't do a whole turkey, and skin of any kind is a bit of a lost cause, but skinless turkey breasts or drumsticks cooked at ~140F for 10 to 12 hours are amazing. More moist and tender than brined, and no risk of being too salty. And with wires everywhere, and an electronically controlled thermometer and heater, cooking doesn't get any geekier.
grnbrg
PS: If you're oven cooking, look up brining. It's easy, and makes a huge difference.