If you buy a new iPad from Best Buy, you'll get the chance to walk away with a free Mi-Fi from Verizon, Sprint, or AT&T (with new 2-year contract). A decent deal if you know you'll need the bandwidth.
"There is no elastic. There is no fold-over flap. The case doesn't even have the little bit of extra room that the one that Sprint is promoting...it's just a simple zip-up case that resembles a poor man's clutch purse..." [Gear Live]
Sprint's Overdrive hub is a lot more than a cellular modem: It's got dual 4G/3G connectivity, shared connections with up to five devices over Wi-Fi, and can serve as a sort of mini NAS, with shared microSD storage.