Looks like this is back in stock at GameStop.com (online only), but it's full price (plus tax and shipping). Only a deal if you want it and can't find it anywhere else. Looks like they have 211 available at the time I posted this.
Here's a "funny" story:
I stopped by a GameStop on my way home tonight to see if they had a copy in back. I didn't expect them to since their online store said they didn't have any, and they confirmed they didn't. But when I said it looked like a nearby store had one in stock and asked the guy to call them to hold it for me, the other employee in the store said to the guy I was talking to "Go ahead and tell them they can sell it since I had some car problems and can't afford it". Basically, while their online inventory system said they had it in stock, they had been holding the game for another GameStop employee for the last couple of weeks and were telling customers they didn't have any. Normally I'd be pissed at these shenanigans since I'm sure it's against their official policies, but at least the guy did me a favor by telling them to sell it to me.
And when I stopped by the other store, they weren't going to admit they had it until I mentioned the name of the employee from the other GameStop store. Ends up that the box was a bit crushed, so while I bought it anyway, I think I may order a copy from the online store and return the crushed one. It's only about $6 more for the shipping, and it's worth it to have a pristine box.