Skype founder Niklas Zennstrom’s newFreedomPop project was initially shrouded in secrecy, but they’ve recently become a bit more talkative about how the company plans to offer “free wireless broadband” to their customers.FreedomPop CMO Tony Miller spilled the beans about the company’s WiMax-based freemium wireless data service to Forbes, but left yet another question unanswered — what’s the “innovative” new wireless device they’ve got in the works?Well, according to a high-level source inside FreedomPop, it’s an iPhone 4/4S case… with an integrated WiMax radio.