Amazon has the Kinect Sensor Bundle for only $99.99 (reg. $149.99) plus Free Shipping. This was the price Amazon had for it's Black Friday sale and this price may not last long.
This bundle comes with the Kinect Sensor, Kinect Adventures and token codes for downloadable versions of Gunstringer and Fruit Ninja.
Or if you prefer, there is also a current deal on the Xbox:
The Xbox 360 250GB Holiday Bundles is $299.99 and shipping is Free, but you also get a $50 Amazon credit – making it only $249.99.
This Bundle includes Fable 3 and a digital code for Halo Reach.
You will receive the $50 Amazon credit via email within two days after your order ships. While supplies last.