I was able to completely get rid of my airbag light on my dash now. When you remove the stock seats, you are removing SRS airbags that are inside the stock seat shoulders. So you get a flashing airbag light blinking on your dash with racing seats. I went ahead and chopped the connector off the stock seat (a wire that hangs out the bottom of the seat) and soldered in a 4.7 ohm, 1/2 watt resistor on it - to create a loop. I reconnected the connector to the car under my bride seats, did the airbag reset thing, and cleared the airbag light. Tada no airbag light. Below is a album with pictures and descriptions. I'll make a how-to soon. Thanks to MODshack for the resistor spec info!
Nissan 370Z Forum - Equinox's Album: Racing Seats and Airbag Fix