I'm reasonable sure that Radioshack sold nearly all they had at launch nationally. I know of 17 stores (whole district) that sold all their "first come first serve" stock, and it seems most of the preorders were bought as well. The people with preorders still have tomorrow to be able to pick them up. There was also a "reserve" that stores could sell out of the warehouse as if they were in the store, that would be shipped direct to the customer. Those were also gone sometime before 1 pm pacific time. You can be sure district managers will be checking on each and every unit that's still in stores tomorrow morning, having the stores call the customers that have preordered them and not picked up again. Any that are in store right now and weren't preordered, the DMs or even higher, may be moving to other stores(that can sell them) in the morning.
My guess would be the same for Bestbuy, if some Sprint stores were given more, and haven't sold out, there may be some changes in those Sprint stores.