This year's best deal for me is Circuit City's Xbox 360 Arcade Bundle with a 20GB HD and Wireless Controller for $199.99, essentially selling for the same value as the Pro for less, and with an extra controller for good measure. If I didn't already have one, I'd definitely pick it up.
Whenever Gamestop has a sale like this, I always use it to pick up any great games I never got around to actually purchasing, but mostly with the older consoles like Gamecube or PS2. Now that the used sections have some more current titles, I'd like to grab a copy of Burnout Paradise, maybe...