This deal has ended.
Update: this has been revised with a new coupon code valid until 1/2/09. Take 15% off the following Xbox 360 Bundles when you enter coupon code P8KJNT4LV44T9S at Dell: the Xbox 360 Arcade Holiday Bundle now $169.15, the Xbox 360 Pro Bundle (an Xbox 360 with 60gb hard drive + LEGO Indiana Jones and Kung Fu Panda) for $254.15,
a second Pro Bundle (this adds Tom Clancy's EndWar) or third Pro Bundle (this adds Madden 09) for $305.14 or the Xbox 360 Elite Bundle (a black Xbox 360 with 120gb hard drive, two games, a wireless controller, headset and HDMI cable) for $339.15. Also, if you pay via a Dell Preferred Credit Account you'll get an extra 3% off, even if you pay your balance immediately. Shipping is free. Sales tax is charged to most states.