A lot of other fine folks have you covered:
- CheapAssGamer.com (Deals, and their take on the best deals)
- VentureBeat (Deals, and store opening and sales schedule)
If I were looking for a 250GB Xbox this year, I'd probably track down a "Holiday Bundle" (250GB console, Forza 4 (racing game), and Skyrim (best RPG evahr) -- and I'd probably look at Fry's "order at 11 a.m. Thursday at Frys.com, and pick up at your leisure after 9 a.m. Friday".
For the 4GB Kinect console, it really depends what you want. There are several sales on the Holiday Bundle (Disneyland Adventures & Kinect Adventures), cheaper for non-bundle 4GB Kinect consoles, and Walmart's white 4GB Skylanders Starter Pack Bundle for $149.99 is pretty cool, if you're looking to get into that franchise. Or want a white Xbox 360.
You can find the PS3 250GB Holiday Bundle (with Uncharted 1 & 2 and Infamous 1 & 2) for $199.99 at a bunch of places -- with TRU throwing in a free 2nd party controller for the same price.
Nintendo's just-launched console is selling like hotcakes, so no deals on the console.
A few of the multiplatfrom games also have the Wii U version on sale (like FIFA Soccer 13), and there's the I-doubt-it-will-last Old Navy free Super Mario Bros Wii U game (with $40 purchase, doorbuster with "very limited quantities").
TRU is doing buy one, get one 40% off all games, and it doesn't look like they're excluding Wii U titles.
For the PS Vita, again, it depends on your game preference.
- Action/Adventure game? Find an Assassin's Creed III Liberation system bundle at Amazon or GameStop.
- Shooter fan? the Call of Duty: Black Ops bundle $199.99 at Best Buy, or at TRU or Fry's for extras (an essentials pack or storage card, respectively, for the same price).
- Family fare? The LEGO Batman 2 bundle at Target.
Best Buy has the best deal for the 3DS Holiday Bundle (flame-red 3DS and Super Mario Land 3D) for $150.
Nintendo's previous console can be found for $89 for the basic white, or $99 for the sexy black version that includes Wii Sports and Sports Resort.
Games-wise, there are a ton of great deals, depending on your preference. New games like Assassins Creed III, Borderlands, XCOM, and Dishonored can be found at Walmart for $25, the Microsoft Store is selling a ton of $25 games, and I'm hoping snag a $15 copy of Forza Horizon (also at Walmart).
Keep in mind, Amazon is matching most of the big game sales at various times throughout Thursday and Friday.
And don't miss Steam's daily PC games sale now through Monday (new games each day, including 4-packs) -- Ridiculously awesome discounts.
Look at that; I kind of did do a Black Friday post.