We received a tip earlier today that Sprint stores were finding boxes of Motorola Xoom accessories this morning, ahead of what would presumably be a launch of the tablet on that carrier. Now BGR has some pics of what is certainly a Xoom case along with an entry in the store's inventory system, strong indicators that the tablet will indeed be soon available there. Of course, we're all still waiting on the LTE wizardry Moto is said to be enabling on the Verizon flavor, but we woul