Well, wouldn't you know it? Seems that tongue-in-cheek marketing campaign may actually be working. Way back in April of this year, Sprint decided it would begin offering its own iPad case, despite the fact that even today the iPad isn't sold in Sprint stores. The reason? It's the perfect opportunity to push the Overdrive, a 4G mobile hotspot that's able to take the iPad (and any other WiFi-enabled device) to 4G speeds where available. In a recent interview with GigaOM, the carrier's CEO (Dan Hesse) confirmed that most iPads being sold are of the WiFi variety, and due to that, "the company has seen an uptick in demand for its Overdrive (3G/4G) wireless-hotspot device, as people use it to connect their iPads to the Internet when on the go." He failed to exaggerate on actual numbers, but it's obvious he's in favor of Apple's darling tablet selling like hotcakes -- after all, how else are you going to get an iDevice into 4G territory?