For the impulse purchasers here, let me screw you out of a couple bucks:

http://www.auberins.com/index.php?main_page=product_info&...

http://www.amazon.com/Black-Decker-RC880-Steamer-Stainless/d...

http://www.amazon.com/Seal-A-Meal-VS107-Vacuum-Food-Sealer/d...

The rice cooker plugs into the Auber PID controller, the PID controller plugs into the wall. You set the temperature on the controller (say, to 130f for perfect steak), and it turns the rice cooker on and off to maintain that temperature. You bag steaks with the seal-a-meal, put 'em in the bath, and walk away for a day or two. Done.

Side benefit that my partner Dave noted: your kitchen now looks a little bit more like a meth lab. Sexy!